Key features: 1. It's designed according to projects with minimum installation volume requirement. 2. 2-CH video in one coaxial cable transmission. 3. technology is easy for multi-channel signals transmission only in one coaxial cable without any delay and interference. 4. Perfect support coaxial video line, 75-3, 75-5, RG59 wire, etc. 5. AHD perfect quality effect, support 1080p, 960p, 720p Six core functions : Compatible HD-AHD / Analog signal , Clear image , Easy installation , Far distance , Plug and play , Save money 400M long distance transmission Real time transmission , HD image quality : No compression digital signal transmission technology, no attenuation, no distortion, efficient transmission.Compatible with AHD and Analog signals No debugging, plug and play : Modular design, reliable and flexible equipment, no need to change the setting of terminal equipment, no need to shut down for maintenance, support hot plug. Material: plastic+metal colour: Black Package Contents: 1 x Transmitter 1 x 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.