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; The built-in ESD electrostatic protection circuit, comprehensive security protection system; Simple and convenient installation, plug and play, do not need to set up. Cable length is about 60cm,mini portable size,easy to carry away and use at anytime. Colour:White Material:plastic Package Contents: 3 x HDMI-compatible Transmitter 3 x HDMI-compatible Receiver 3 x English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.