Feature: 1. 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. The expandable base supports external USB devices like microphone, mouse, and keyboard. 2. 4K Ultra HD, Adjustable Image Brightness: Equipped with sensor, maximum resolution 3840x3104. The doc camera has brightness buttons, you can manually adjust the image brightness, to make sure that you can get the clear image. 3 levels of brightness adjustable, which can eliminate shooting problems under difficult lighting conditions, allowing you to get objects in dark and bright environments, and it can also achieve selfie fill in function. 3. Foldable Document Camera for Teachers: Embedded design, occupies a small space after folding, easy to carry. Multi joint support with multi angle rotate freely USB camera can get 2D and 3D objects better and shooting HD images and videos. Maximum covering area is 16.5x116in (A3 paper). 4. Document Camera with 30fps: using High end image sensor, it output UHD 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 get objects as close as 3.94in. 5. Plug and Play and High Compatibility: The document camera for teachers comes with a USB C cable that allows for instant plug and play operating for distance education and web conferencing. It applicable for Win PCs (for Win 7 8 10 11), for OS X 10.11 or higher), and for Chromebooks(38.00 or higher), and work for Tiktok, for Skyp, for Zoom, it has built in dual silicon microphones, which can reduce noise and improve sound quality. Specification: Item Type: 4K USB Document Camera Material: Plastic, Electronics Focus Type: Auto Focus Microphone: Built in Mirror Mode: 5 Level Exposure Led Fill Light: With 3 Level Fill Light Power Supply: USB Direct Power Supply. Package List: 1 x 4K USB Document Camera 1 x Supply Cord