【SCREEN MIRRORING VIDEO/AUDIO to BIG SCREEN】 wireless hmdi transmitter and receiver supports video resolution up to 4K@30Hz 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.