Amazon THUSTAND  
THUSTAR 8MP Document Camera & Webcam 4K with Dual Microphones, USB Visualiser A3-Size, 3-Level LED Lights, Image Invert Function, Fold, for Live Demo, Distance Education -Windows, macOS and Chrome OS
USB Document Camera with adjustable image reversal: The camera that can manually adjust image reversal. In video chat or image output, the image can be freely adjusted left/right and up/down; you can also manually adjust the reversed image that appears in the device to a normal image
8MP/2448P document camera with 30fps: using Sony's image sensor, it output ultra-high-definition images and videos live transmission, up to 2448P megapixels. Press the focus button once to automatically focus the document camera once. Moving the object under the lens, the camera will not be arbitrary automatic focus and the image dance. Macro can capture objects as close as 3.94"
Document Camera with Adjustable Image Brightness : the usb camera has brightness (plus) and brightness (minus) buttons, you can manually adjust the image brightness with 10 degree, to make sure that you can get the clear image. Camera comes with 14 ring lamp beads, 3 levels of brightness adjustable, which can eliminate shooting problems under difficult lighting conditions, allowing you to capture objects in dark and bright environments, and can also achieve Selfie fill-in function
Foldable Document Camera for teachers/classroom: embedded design, occupies a small space after folding, easy to carry; Multi-joint support with multi-angle rotate freely usb camera can capture 2D and 3D objects better and shooting high-definition images and videos. Maximum covering area: 16.5" x 116" in. (A3 paper)
USB Camera with highly compatible, plug-and-play : applicable to Windows PCS, Macs, and Chromebooks, automatically installs drivers when the device is plugged in, compatible with Tiktok, Google Meet, Skyp-Microsoft Teams, Zoom; it has built-in dual silicon microphones, which can reduce noise and improve sound quality
THUSTAR 8MP Document Camera & Webcam 4K with Dual Microphones, USB Visualiser A3
Amazon Coway  
Coway Airmega AP-1512HH(W) True HEPA Purifier with Air Quality Monitoring, Auto, Timer, Filter Indicator, and Eco Mode, 16.8 x 18.3 x 9.7, White
Coway Mighty (AP-1512HH) is designed to accommodate room sizes up to 361 sq. ft (CADR: Dust 246 / Pollen 240 / Smoke 233 cb. ft. ).
4 Stage Filtration System (Pre-filter, Deodorization filter, True HEPA filter, Vital Ion) captures and reduces up to 99. 97% of particles 0. 3 microns in the air, including pollen, pollutants and other allergens. It also reduces volatile organic compounds and reduces odor.
Coway Mighty pollution sensor communicates indoor air quality in real-time. The brightly colored LED lets you know how clean or dirty your indoor air is every minute of the day. And it features a timer, and filter lifetime indicator.
Fan speeds available in 1, 2, 3 stages by manually setting up. While auto mode automatically optimizes the speed setting 1 through 3 based on the level of indoor air quality. When no pollution is detected for 30 minutes, the fan will automatically stop and set as Eco mode to save energy.
Timer feature allows the machine to run 1/4/8 hours before automatically powering off.
Filter replacement indicator checks both Pre-filter and HEPA filter respectively to let users be aware of when to wash or replace the filter.
77 W power consumption and quiet operation with noise level ranging from 24. 4 dB to 53. 8 dB.
Limited manufacturer's covers any internal/functional parts for 1 year and motor and electronic parts for 3 years. Filters are excluded.
Won the Best Air Purifier of 2018 at Wirecutter and ranked 1st place at the TopTenReviews.
Power source type: Electric
Coway Airmega AP-1512HH(W) True HEPA Purifier with Air Quality Monitoring, Auto,
Amazon Aprilaire  
Aprilaire 500M Whole Home Humidifier with Manual Control + Bypass Humidifier Installation Kit, Compact Furnace Humidifier, Large Capacity Whole House Humidifier for Homes up to 3,000 Sq. Ft.
BUY WITH CONFIDENCE This humidifier was designed and manufactured in the U.S.A. by Aprilaire – the inventor of the whole home evaporative humidifier, and the leader in indoor air quality solutions
COMPLETE FURNACE HUMIDIFIER INSTALLATION KIT includes everything you need to install your new Aprilaire Whole Home, Manual Bypass Furnace Humidifier Models: 400M, 500M, 600M
FULL COVERAGE up to 3,000 square feet in tightly built homes with a capacity of 12 gallons per day
MANUAL HUMIDIFIER with a single sensor built into the standard control monitors indoor relative humidity for use in manually setting the percent humidity in your home
FEEL MORE COMFORTABLE while also preserving items in your home susceptible to damage from changing humidity or dry conditions
HUMIDITY FOR HEALTH Aprilaire Humidifiers can help you maintain optimal humidity in your home of 35% – 45% which has been shown to reduce the incidence of respiratory infections and symptoms related to allergies and asthma by minimizing the formation of bacteria and viruses, fungi, and dust mites. In addition, you’ll feel more comfortable while also preserving items in your home susceptible to damage from changing humidity or dry conditions
Aprilaire 500M Whole Home Humidifier with Manual Control + Bypass Humidifier Ins
Amazon IPEVO  
IPEVO V4K Ultra High Definition 8MP USB Document Camera — Mac OS, Windows, Chromebook Compatible for Live Demo, Web Conferencing, Distance Learning, Remote Teaching
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 noise reduction and color Reproduction – great for capturing in dimly lit environments
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 inch x 10.04 inch
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 Intel Core i5 CPU 2.5 GHz or higher, OS X 10.10 or higher, Solid-state drive, and 200MB of free hard disk space, 256MB of dedicated video memory (For lag-free live streaming up to 1920 x 1080, and video recording of 1920 x 1080). Windows Recommended Requirements - Microsoft Windows 10,Intel Core i5 CPU 3.40 GHz or higher, 4 GB RAM, 200MB of free hard disk space, 256MB of dedicated video memory (For lag-free live streaming up to 1920 x 1080, and video recording of 1920 x 1080)
IPEVO V4K Ultra High Definition 8MP USB Document Camera — Mac OS, Windows, Chrom
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