20 Best Digital Overhead Projector Camera [2024]

Are you looking for the best Digital Overhead Projector Camera? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling Digital Overhead Projector Camera.

We Recommended:

# Preview Product
1 OKIOLABS OKIOCAM S USB 2-in-1 Document Camera & Webcam for Distance Learning, Video Conferencing,... OKIOLABS OKIOCAM S USB 2-in-1 Document Camera & Webcam for Distance Learning, Video Conferencing,...
2 Mini Projector, PVO Portable Projector for Cartoon, Kids Gift, Outdoor Movie Projector, LED Pico... Mini Projector, PVO Portable Projector for Cartoon, Kids Gift, Outdoor Movie Projector, LED Pico...
3 IPEVO V4K Ultra High Definition 8MP USB Document Camera — Mac OS, Windows, Chromebook Compatible... IPEVO V4K Ultra High Definition 8MP USB Document Camera — Mac OS, Windows, Chromebook...
4 Meta Quest 2 — Advanced All-In-One Virtual Reality Headset — 128 GB Meta Quest 2 — Advanced All-In-One Virtual Reality Headset — 128 GB
5 AuKing Mini Projector 2022 Upgraded Portable Video-Projector,55000 Hours Multimedia Home Theater... AuKing Mini Projector 2022 Upgraded Portable Video-Projector,55000 Hours Multimedia Home Theater...
6 Mini Projector,HOMPOW Portable Projector 1080P Supported 2022 Upgraded Movie Projector and 176'... Mini Projector,HOMPOW Portable Projector 1080P Supported 2022 Upgraded Movie Projector and 176"...
7 Mini Projector, TOPVISION WiFi Portable Projector for Outdoor Movie Night, 1080P Supported Movie... Mini Projector, TOPVISION WiFi Portable Projector for Outdoor Movie Night, 1080P Supported Movie...
8 ONOAYO 5G WiFi Outdoor Projector 4K Supported, 13000L 450 ANSI LM FHD Native 1080P Bluetooth... ONOAYO 5G WiFi Outdoor Projector 4K Supported, 13000L 450 ANSI LM FHD Native 1080P Bluetooth...
9 Overhead Tripod for DSLR Cameras, Heavy Duty Camera Desk Mount Stand with Flexible Articulating Boom... Overhead Tripod for DSLR Cameras, Heavy Duty Camera Desk Mount Stand with Flexible Articulating...
10 JUSMO Camera Desk Mount with Auxiliary Holding Arm, Overhead Camera Mount with 360° Ballhead and... JUSMO Camera Desk Mount with Auxiliary Holding Arm, Overhead Camera Mount with 360° Ballhead and...
11 eloam Portable Document Camera HDMI, VGA Port, OCR Visual Presenter for... eloam Portable Document Camera HDMI, VGA Port, OCR Visual Presenter for...
12 Horizontal Tripod,62''Camera Tripod & Monopod for DSLR, Professional Tripod with Horizontal Arm,... Horizontal Tripod,62''Camera Tripod & Monopod for DSLR, Professional Tripod with Horizontal Arm,...
13 FlightScope Mevo - Portable Personal Launch Monitor for Golf FlightScope Mevo - Portable Personal Launch Monitor for Golf
14 VIISAN P4U 13MP 4K UHD Document Camera, USB Visualiser Camera & Webcam with Dual-Mode AutoFocus and... VIISAN P4U 13MP 4K UHD Document Camera, USB Visualiser Camera & Webcam with Dual-Mode AutoFocus...
15 Longjoy Digital Portable Overhead USB Distance Teaching Document Camera LV-1020 (White) Longjoy Digital Portable Overhead USB Distance Teaching Document Camera LV-1020 (White)
16 INSWAN INS-3 Detachable 5MP USB Document Camera, Webcam, Visualizer—Capture 1920p Super High... INSWAN INS-3 Detachable 5MP USB Document Camera, Webcam, Visualizer—Capture 1920p Super High...
17 IPEVO V4K PRO Ultra HD USB Document Camera with AI-Enhanced Mic, for Classroom visualization, Online... IPEVO V4K PRO Ultra HD USB Document Camera with AI-Enhanced Mic, for Classroom visualization,...
18 CZUR Shine500-Pro High-Speed Document Camera, Smart USB Document Scanner with OCR Function for MacOS... CZUR Shine500-Pro High-Speed Document Camera, Smart USB Document Scanner with OCR Function for...
19 MOSHUSO Camera Mount Clamp with 360° Ballhead Arm, for DSLR Camera/Field Monitor/LED MOSHUSO Camera Mount Clamp with 360° Ballhead Arm, for DSLR Camera/Field Monitor/LED
20 Elmo 1379 Model TT-12W STEM-CAM Visual Presenter, Document Camera with 192x Zoom (12x Optical + 16x... Elmo 1379 Model TT-12W STEM-CAM Visual Presenter, Document Camera with 192x Zoom (12x Optical +...
SaleBestseller No. 1
OKIOLABS OKIOCAM S USB 2-in-1 Document Camera & Webcam for Distance Learning, Video Conferencing,...
  • [2-in-1 document camera & webcam] Use it as a webcam for online lectures and conference calls, or use it as a document camera when you need to...
  • [Portable, light, and highly adjustable] Easy to carry at 0.59lbs (269g) with retractable arm and foldable magnetic baseplate. Take it with you in...
  • [Plug and play] OKIOCAM S works with video conferencing and recording tools without the need for the additional driver. Compatible apps like Google...
  • [Exclusive OKIOCAM Apps Kit] Explore more comprehensive functions with complimentary OKIOCAM Snapshot & Recorder, Stop Motion, and Time Lapse Apps,...
  • [Highly Compatible] Works on Windows PC, Mac, and Chromebook. Camera sensor up to 1920x1440 pixels; up to 30fps at 1920x1080p. Detachable arm and...
SaleBestseller No. 2
Mini Projector, PVO Portable Projector for Cartoon, Kids Gift, Outdoor Movie Projector, LED Pico...
  • ☀ Gift for Children: Mini projector is a must-have product for children to watch cartoons and videos, which is very popular with children. When...
  • ☀ Small and Portable: Mini video projector is small and portable, and can be carried in a pocket or bag. Even children can hold it easily. You can...
  • ☀ Upgrade Performance: PVO YG300Pro upgraded in 2022, support 1080P full HD and the natural resolution have increased to 800*480. Improve the...
  • ☀ Multiple Interface: Small projector is equipped with multiple ports, including HDMI, USB, audio and other interfaces. It can be easily connected...
  • ☀ Power Bank supply: The mini portable projector is powered by a power adapter (does not have a built-in battery), It can also be powered by mobile...
SaleBestseller No. 3
IPEVO V4K Ultra High Definition 8MP USB Document Camera — Mac OS, Windows, Chromebook Compatible...
  • Features an 8 Megapixel camera for capturing Ultra High Definition live images up to 3264 x 2448 pixels
  • High frame rate for lag-free live streaming – streams at up to 30 fps at full HD, and up to 15 fps at 3264 x 2448 pixel
  • Fast focusing speed helps minimize interruptions for frequent switching between different materials; features Sony CMOS Image Sensor for exceptional...
  • Designed and made in Taiwan. Multi-jointed stand offers a simple fix for tightening loose joints caused by heavy daily use.Max Shooting Area:13.46...
  • Works with a variety of software and applications on Mac, PC and Chromebook that allows you to use it in different ways. System Requirements - Mac...
Bestseller No. 4
Meta Quest 2 — Advanced All-In-One Virtual Reality Headset — 128 GB
  • Keep your experience smooth and seamless, even as high speed action unfolds around you with a super-fast processor and high-resolution display.
  • Experience total immersion with 3D positional audio, hand tracking and haptic feedback, working together to make virtual worlds feel real.
  • Explore an expanding universe of over 350 titles across gaming, fitness, social/multiplayer and entertainment, including exclusive blockbuster...
  • Travel universes in blockbuster fantasies, scare yourself witless in horror adventures or collaborate with colleagues in innovative workspaces.
  • Come together in incredible social spaces and multiplayer arenas as you take in live events with friends and family, find your new workout crew or...
SaleBestseller No. 5
AuKing Mini Projector 2022 Upgraded Portable Video-Projector,55000 Hours Multimedia Home Theater...
  • ★【Superior Home Theater Projector 】2022 Upgraded mini projector equipped with 2000:1 contrast ratio, supported 1080p resolution, brings you a...
  • ★【Big Screen & Built-in Speakers】The mini projector has a 32~170 inches projection display size with 1m to 5m projection distance. Built-in...
  • ★【Low Noise & Long Lamp Life】The projector is lower in noise and more durable than previous models thanks to advanced fan cooling technology....
  • ★【Multiple Devices Connection & Portable】This portable movie projector is fit for playing videos, TV series, photos sharing, football matches...
  • ★【2 Year Satisfied Warranty】Our team offers every customer 100% satisfaction guarantee. If you have any problems while using, please feel free...
SaleBestseller No. 6
Mini Projector,HOMPOW Portable Projector 1080P Supported 2022 Upgraded Movie Projector and 176"...
  • Projector Mini and support 1080P HD:♥This phone projector support 1920x1080P high resolution which give you and your family an amazing feeling,...
  • Support multiple multimedia device:♥This mini home projector has a mini SD card slot,composite video in, vga, HDMI, and 2 USB ports. Here is a tip,...
  • Big screen & built-in speakers: ♥It is a really decent movie projector for indoor use,The recommended projection distance is 60-200 inches, you will...
  • Low noise:♥The portable movie projector is lower in noise and more durable than previous models thanks to advanced fan cooling technology. Add to...
  • Easy to use and 2 years warranty: ♥The bottom of the movie projector where the height/tilt adjuster is can be used to mount the projector onto a...
Bestseller No. 7
Mini Projector, TOPVISION WiFi Portable Projector for Outdoor Movie Night, 1080P Supported Movie...
  • 👍【Fast Connection Via WiFi or USB cable】This mini projector compatible with Android, iPhone, TV stick, and PS3, PS4, and other audio and video...
  • 📽【 Design for More Professional】200" movie projector support 1080P, Full HD resolution ensures clear color and image processing. You will also...
  • 🎧【HiFi Stereo Speakers & Upgraded Cooling System】 This portable projector has 3W HiFi stereo speakers, which you can get a superior sound...
  • 🎮【Rich Interface & Wide Compatibility】 Equipped with various ports such as VGA / USB / HDMI / AV / SD / audio output. the outdoor movie...
  • 📞【Two-year & Lifetime Professional Support】This cell phone projector is very suitable for home movie entertainment, backyard, games, yoga, and...
SaleBestseller No. 8
ONOAYO 5G WiFi Outdoor Projector 4K Supported, 13000L 450 ANSI LM FHD Native 1080P Bluetooth...
  • ✦【5.1 Bidirectional Bluetooth &5G WiFi Projector】 With the latest Bidirectional Bluetooth tech, ONO1 video projector can not only connect to...
  • ✦【450 ANSI lumens & Native 1080P & 12000:1 Contrast Ratio】Our ONO1 movie projector equips 450 ANSI lumens brightness, 1920x1080P...
  • ✦【User-friendly 4-Point Keystone Correction & ZOOM Function & Backpack Included】The advanced 4D/4P Keystone can adjust Vertical and Horizontal...
  • ✦【Dust-Proof Sealed Optical Engine & Multimedia Connection】The Sealed Optical Engine of our dust-proof projector prevents dust entering the...
  • ✦*If a big black block appears, PLEASE contact us and we promise will solve it! 【3-Year Repair & Lifetime Professional Technical Support &New...
SaleBestseller No. 9
Overhead Tripod for DSLR Cameras, Heavy Duty Camera Desk Mount Stand with Flexible Articulating Boom...
  • 【Sturdy & 5 lbs Load】 This over head camera mounts are upgraded heavy duty design and made of durable metal; With strong spring, the enhanced arm...
  • 【Adjustable Mounting】This dslr mount is flexible with 2 arm, each arm is 13.7inch and reach a max height 31.5inch extension; The base joint can be...
  • 【With 1/4 Thread Head】This top view tripod has a universal 1/4-20 screw head adapter, it is also compatible with dslr, slr, ring light, led video...
  • 【Tabletop Mounted Rig】The desktop tripod can be mounted to your table with max thickness 2 inch; The Jaw Clamp is made of alumium which is...
  • 【Wide Application】 The overhead clamp camera tripod is widely use in different applications like overhead video shots, make great baking crafting...
Bestseller No. 10
JUSMO Camera Desk Mount with Auxiliary Holding Arm, Overhead Camera Mount with 360° Ballhead and...
  • Desk mount stand 17.3-41.3 inch adjustable, gives you ample height for overhead shooting and lighting. And 14 inch auxiliary holding arm for cameras,...
  • Desk mount stand and auxiliary holding arm all have standard 1/4 screw can be mounted for the most cameras and lights which have a 1/4” adapter....
  • Secure more gear to your Desk mount stand. A single steel pole that clamps horizontally onto Desk mount stand, solid arm provides an auxiliary...
  • NOTE: It is recommended to adjust the your required height of the Desk mount stand before installing the Auxiliary holding arm. And if you need adjust...
  • NOTE: DSLR Cameras, Phone, Lights Not included.
SaleBestseller No. 11
eloam Portable Document Camera HDMI, VGA Port, OCR Visual Presenter for...
  • Note:"Doesn't support mac!"
  • 【OCR-- The Remarkable Recognition Technology】Eloam Use a leading OCR technology. Recognize characters, tables, symbols; supported multiple...
  • 【Education Presentation With HDMI ,VGA Interface 】It can directly connect to projector, whiteboard or any display devices by VGA,and HDMI without...
  • 【Image edit processing and make annotations】The software owns strong image edit functions: image cutting, rotate, characters adding, adjust...
  • 【Timing shooting and fast Copying】Automatically scan after setting the shooting interval time, dramatically time-saving for scanning larger...
Bestseller No. 12
Horizontal Tripod,62''Camera Tripod & Monopod for DSLR, Professional Tripod with Horizontal Arm,...
  • 💖💖【Horizontal Tripod 】: The Horizontal arm tripod central column can be put horizontally and rotated 360°horizontally to realize panorama...
  • 💖💖【Portable & Adjustable】The tripod for all camera and you can adjust the working height from 21.8’’ to 63.5’’ in seconds, the N....
  • 💖💖【Multi-function Tripod】 The tripod for camera can be transform Monopod, One of the foot tube can be quickly assembled and disassembled...
  • 💖💖【Strong Stability】The camera tripod have 25mm large diameter aluminum alloy tube, loading capacity can reach 22.04lbs (10kg), Enough to...
  • 💖💖【Customer service】 This stands backed with 2-year free Warranty and 30 days return. If you ordered wrong product or the product is...
SaleBestseller No. 13
FlightScope Mevo - Portable Personal Launch Monitor for Golf
  • Practice with purpose with this lightweight and portable 3D Doppler radar launch monitor.
  • Practice Anywhere- Use Mevo to improve on the range, on the course, and at your home with video and data on every shot
  • 8 Data Parameters- Includes 8 full swing performance data parameters with direct spin measurements
  • Mevo Skills Challenges- Includes PGA & LPGA Challenges, Long Drive Competition & Range Competition
SaleBestseller No. 14
VIISAN P4U 13MP 4K UHD Document Camera, USB Visualiser Camera & Webcam with Dual-Mode AutoFocus and...
  • [2-In-1 Document Camera & Webcam] Dual-Mode, Ideal For Use In Home, School, And Office. Viisan P4U Allows You To Present The Textbooks, 3D Objects, Or...
  • [Ultra High Definition By Sony & 4K High Frame Rate] Powered By Sony 13-Megapixel Camera With An Autofocus Lens That Allows You To Capture...
  • [Built-In Led Light & Unique Multi-Jointed Design] It allows you quickly adjust the camera head to capture your contents from different angles or...
  • [USB (UVC) Standard, Plug-and-Play, and Features a Built-in Microphone] VIISAN P4U works with all major video conferencing software without installing...
  • [Interactive VisualCam Visualizer Software] Works with an exclusive powerful VisualCam software, this visualizer software provides various annotation...
Bestseller No. 15
Longjoy Digital Portable Overhead USB Distance Teaching Document Camera LV-1020 (White)
  • LV-1020 is a 8 mega USB type of camera needs to connect with computer devices. It is specifically designed for scanning paper, ID card, presentation...
  • Features 4-Level touch control LED light with 5 Megapixel camera for capturing A4 size. You can twist, fold and rotate the LV-1 in many different ways...
  • For virtual meeting purpose, installing the software by the tiny cd is not necessary, it can be directly run-on “Zoom”, or open the other camera...
  • Scanning software is needed to install by a tiny cd. It can only run-on Windows System, not compatible with Mac, Chromebook. You can also install the...
Bestseller No. 16
INSWAN INS-3 Detachable 5MP USB Document Camera, Webcam, Visualizer—Capture 1920p Super High...
  • Versatile 3-in-1 camera: The INS-3 brings document camera function and convenience to a whole new level. You can secure the camera to its base for...
  • The detachable design frees up valuable desk space: The detachable camera fits into a multi-joint arm anchored by a small and sturdy base, allowing...
  • Intuitive design with 1920P super high-definition image: The 5MP sensor takes crisp 2560x1920p live images at up to 30fps. You can capture crystal...
  • Exclusive downloadable Documate software: In addition to the INS-3’s built-in features, Documate provides advanced tools to enhance classroom or...
  • Plug-n-Play & High Compatibility: The INS-3 comes with a USB-A cable that allows for instant plug-and-play operation for distance education, web...
Bestseller No. 17
IPEVO V4K PRO Ultra HD USB Document Camera with AI-Enhanced Mic, for Classroom visualization, Online...
  • 8-megapixel image sensor by Sony, with exceptional clarity and color reproduction.
  • Ultra HD video (up to 30 fps at 3264 x 2448p) ensures detailed and clear display of the presented materials.
  • AI-Enhanced microphone - filters out background noise during communication, leaving your voice natural, undisturbed, and easy to hear. Activate it...
  • Built-in LED light helps out when the room is too dark. Together with the multi-jointed arm, it allows you to get the shot that you need, with the...
  • V4K PRO is plug & play and compatible with Mac, Windows, or Chromebooks with a USB Type-A port. Works with video conferencing software such as Zoom,...
Bestseller No. 18
CZUR Shine500-Pro High-Speed Document Camera, Smart USB Document Scanner with OCR Function for MacOS...
  • Design & Speed:Work with Windows XP,7,8,10 AND macOS 10.11 or later , macOS 10.13 or later recommended. Designed for A4(8.27*11.75 inch) document, any...
  • USB Document Scanner & Camera: Work as both a document camera for remote teaching&learning compatible with ZOOM, Google Meet, Skype and a document...
  • High Resolution & AI Tech: CMOS 5MP (2593*1944, 210 DPI) camera. Smart Paging and Auto Cropping, Combine Sides, Stamp Mode, and Multiple Color Modes....
  • Powerful OCR Function: Able to scan 100+ languages and convert to JPG, PDF, Searchable PDF, Word, Excel and TIFF powered by ABBYY
  • Affordable & Portable: 90 degree foldable and lightweight 4 lbs with foot pedal for convenient operation. 1-year warranty is included
Bestseller No. 19
MOSHUSO Camera Mount Clamp with 360° Ballhead Arm, for DSLR Camera/Field Monitor/LED
  • This 360º Articulation Double Ball Adapter with clamp (Red Knob) is designed for photography studio video shooting.Crab clamp maximum open distance...
  • Multifunction: the maximum open distance of the clamp is 54mm, which can help you fix the accessories on 15mm rods, for DJI Freely Movi 25mm and 30mm...
  • Standard 1/4” and 3/8” female thread: 1/4” and 3/8” female thread on the back-side of clamp help you to mount a small camera, monitor, LED...
  • Flexibility: you can remove the ballhead arm form the clamp and install a different type of arm with a standard 1/4” male screw; the ballhead can be...
  • Great quality: the pipe clamp and ball head (and wingnut) are made of aircraft aluminum and stainless steel. The piper clamp has rubber padding to...
Bestseller No. 20
Elmo 1379 Model TT-12W STEM-CAM Visual Presenter, Document Camera with 192x Zoom (12x Optical + 16x...
  • 192x Zoom (12x Optical + 16x Digital) and multiple auto focus options
  • HDMI out (Type A), HDMI In (Type A), RGB Out (D-sub 15p), USB (Type A) x2, USB (Type B), Ethernet (RJ-45), Audio Out (3.5mm Stereo), Audio In (3.5mm...
  • Built-in remote control dock so you'll never misplace your remote control again
  • Powered by Android to offer support for a wide range of educational apps, opening up a world of learning without ever needing additional equipment....

Having trouble finding a great Digital Overhead Projector Camera?

This problem is well understood by us because we have gone through the entire Digital Overhead Projector Camera research process ourselves, which is why we have put together a comprehensive list of the best Digital Overhead Projector Cameras available in the market today.

After hours of searching and using all the models on the market, we have found the best Digital Overhead Projector Camera for 2023. See our ranking below!

How Do You Buy The Best Digital Overhead Projector Camera?

Do you get stressed out thinking about shopping for a great Digital Overhead Projector Camera? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching Digital Overhead Projector Camera, which is why we have assembled a comprehensive list of the greatest Digital Overhead Projector Camera available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for Digital Overhead Projector Camera that you consider buying. Your questions might include the following:

  • Is it worth buying an Digital Overhead Projector Camera?
  • What benefits are there with buying an Digital Overhead Projector Camera?
  • What factors deserve consideration when shopping for an effective Digital Overhead Projector Camera?
  • Why is it crucial to invest in any Digital Overhead Projector Camera, much less the best one?
  • Which Digital Overhead Projector Camera are good in the current market?
  • Where can you find information like this about Digital Overhead Projector Camera?

We’re convinced that you likely have far more questions than just these regarding Digital Overhead Projector Camera, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for Digital Overhead Projector Camera, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible Digital Overhead Projector Camera. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an Digital Overhead Projector Camera buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available Digital Overhead Projector Camera currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of Digital Overhead Projector Camera has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an Digital Overhead Projector Camera?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your Digital Overhead Projector Camera.
  5. Customer Ratings: Number ratings grade Digital Overhead Projector Camera objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their Digital Overhead Projector Camera.
  7. Product Quality: You don’t always get what you pay for with an Digital Overhead Projector Camera, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an Digital Overhead Projector Camera is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining Digital Overhead Projector Camera information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding Digital Overhead Projector Camera is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

Related Post:

FAQ:

Q: What is a projector camera?

A: Projector-camera systems (pro-cam), also called camera-projector systems, augment a local surface with a projected captured image of a remote surface, creating a shared workspace for remote collaboration and communication. Projector-camera systems may also be used for artistic and entertainment purposes. A pro-cam system consists of a vertical screen for implementing interpersonal space where …

Q: What is a digital image projector?

A: digital projector (digital projection display system): 1) A digital projector, also called a digital projection display system, is a specialized computer display that projects an enlarged image on a movie screen. Such devices are commonly used in presentations.

Q: What is a document camera projector?

A: – Document Camera includes a 10-inch USB Cable – Full HD 1080p output resolution – Jointless, highly flexible gooseneck – High-speed 30fps dynamic image, Hands-free auto focus, Plug-and-Play – Special water droplet design – Compatible with all major brands of interactive whiteboards