Warm Tips:1.Can't go through walls or barriers,pls use it in a barrier-free open space. Note: receiver can't pair with mobile phone, please don't use it alone, it has 50m 100m 150m range, please choose the one according to your situation. 1080P version support 1 TX to 4 RXs, but 4K verison only support 1 TX to 1 RX. About this item: 4K Ultra HD Resolution wireless HDMI transmitter and receiver supports video resolution up to 4K(3840 X 2160) and more resolutions(1080P full HD/720P),Built-in chip can prevent delay and lag caused by signal interference, you can enjoy clear and vivid images in a large screen. This Mirroring Dongle is perfect for learning, business meeting, family party and playing games and gives you a great screen experience. Powerful function: Wireless HDMI-Compatible adapters support stream HD 4K 3D movies, TV shows, video, games, presentations wirelessly from your Laptop, PC, Mac, Smartphone, PS4/5, Switch, Satellite Box, HDSLR Camera to HDTV, Projector or Monitor. Plug & Play: No drive or APP needed, without messy wires, it's easy to connect and pair TV and will not affect other wireless devices, Wirelessly mirror and share all contents on the big screen, include: pictures, videos, online game, online movies, web browsing, online shopping, documents and more. High-Quality Transmission: In an open field, The distance of the wireless transmission high-definition HDMI-compatible audio/video signals is as high as 50m/100m/150m. if through 1 wall the signal can transmit 10-100m. transmission distance is enough to cover the entire conference room or room in the home, This means you don't have to buy a long HDMI cable to extend video signals. Instructions for use: In both cases, please use a 5V2A adapter to connect the transmitter: 1 When your computer is in low battery, 2 some computers HDMI-compatible imports have low current, the power light of the transmitter will become weak or go out, please use a typec charging cable To support the launcher. Package Content For the option of '1 TX and 1 RX' : 1. HDMI Transmitter----------1 PC 2. HDMI Receiver---------1 PC 2.HDMI Extension Cable ------- 2 PCS 3. USB Power Cable ------- 2 PCS 4. User Manual--------1 PC