1. HDMI video and audio sync transmission ,drive-free and no need wifi or internet 2. HDMI 1.3 ,HDCP1.2 compatible; 3. Support regular HD video resolution 1920x1080@60Hz ; 4. USB port for power supply,no need extra cables,more convenient; 5. Built-in automatic balance system, the picture is fluent, clear and stable; 6. The built-in ESD electrostatic protection circuit, comprehensive security protection system; 7. Simple and convenient installation, plug and play, do not need to set up. 8. Cable length is about 60cm,mini portable size,easy to carry away and use at anytime. and high quality,buy with confidence! It supports up to 30m long distance transmission and very stable TX=Transmitter,RX=Receiver This HDMI extender built-in wireless transmission protocol,it can wireless transmit HD audio and video signal, at the same time,The equipment has excellent image processing and transmission capacity,makes signal transmission more smooth and steady,is a kind of economic and efficient way of HDMI signal extension. It is widly used for Big screen video Conference / home entertainment / online learning / business speech education training /playing game etc. more shocking,more relax, and is better for protecting eyes Colour:As Shown Material:plastic+metal Package Contents: 1 x HDMI-compatible Transmitter 1 x HDMI-compatible Receiver 1 x English manual