1. video and audio mission via built-in wireless mission protocol,no need wifi or internet 2. Support regular HD video resolution 1920x1080@60Hz 3. The fer is efficiency to that the playback fluency 4. Built-in automatic balance system, the picture is fluent, clear and stable 5. The built-in ESD electrostatic protection circuit, comprehensive security protection system; Simple and convenient installation, we have paired,you plug and play, do not need to set up. Introduction: Our product is new chip and upgraded version, more stable. new and high quality,buy with confidence! TX= mitter RX=Receiver This extender built-in wireless mission protocol,it can wireless mit HD audio video signal, at the same time,The equipment has excellent image processing and mission capacity,makes signal mission more smooth and steady,is a kind of economic and efficient way of signal extension. It is widely 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. Reminder: Please use it in accessible open spaces as much as possible. When encountering walls or obstacles, the mission distance of the device be shortened. Colour:Black Material:ABS Package Contents: 1 * RX receiver 1 * TX mitter 2 * power cords 1 * 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.