1. Wireless transmission: no need to set up communications cable 2. Image, audio sync, color black and white compatible 3. Small size, light weight, easy to carry, good installation 4. Responsive, timely, send and receive real-time transmission 5. Using FM mode, anti-interference ability, good image quality The wireless video transmission equipment is an excellent all aspects of performance are more varieties, and its large power margin, more suitable for complex physical environment. The use of 0dB (small antenna) in full to the antenna, the open area to the transmission 5-10km or so, if the raising of the high gain directional antenna, increased to 12KM away, it can be reach up to 100KM on UAV/helicopters. And transmitter technology is superb and the special metal is more conducive to heat, more suitable for long hours of work. Signal input with common AV interface, it can easily work with camera, VCD, DVD and all other conventional AV interfaces compatible. Transmitter: Working frequency: 1.2G Hz Optional channel: 6-CH Transmission power: 5000MW Working voltage: DC 12V Working current: 1200MA Working temperature: -50-90 Working humidity: 85% RH Voice signal: 2VP-P 2KOHM Distance: 800-3000 meters Receiver: Working frequency: 1.2G Hz Channel: 12-CH Working voltage: DC 12V Working current: 280MA Working temperature: -50-90 Working humidity: 85% RH Image signal: NTSC/PAL Voice signal: 2VP-P 2KOHM Sensitivity: -85DB Color: Silver Material: ABS+metal Package Contents: 1x Receiver 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.