1Wireless transmission mode: no need to set up communication cable. 2Response quickly and timely, real-time transmitting and receiving. 3Small and compact, light weight, easy to carry and convenient installation. 4High integration, stable, reliable and ultra long transmitting distance. 5Using frequency modulation mode, strong anti-interference ability, good image quality. Features:Wireless transmission mode: no need to set up communication cable. Image, audio synchronous transmission, colorful and black & white are compatible. Small and compact, light weight, easy to carry and convenient installation. Response quickly and timely, real-time transmitting and receiving. Using frequency modulation mode, strong anti-interference ability, good image quality. High integration, stable, reliable and ultra long transmitting distance. Specification: Condition: 100% Brand New Material: MetalColor: As Picture Shown Transmitter: Transmission Power: 1.5W Transmission Frequency: HC1: 1080 HC2: 1120 HC3: 1160 HC4: 1200 (MHz) Frequency Control: Digital phase-locked loop frequency control, locking each locking points Transmission Signal: Video, audio synchronous transmission Transmission Distance: 1000-2000 meters Voltage: DC+12V Current: 400mA Receiver: Mediation Type: FM Receiving Frequency:0.91.2GHz Received Signal: audio, video, image synchronous transmission Receiver sensitivity: -85dBm Video Input Level: 1Vp-p Audio Input level: 1Vp-p Working Temperature: -20~+50C/-4~+122H Working Humidity: 85%RH Storage Temperature: -40~+80C/-40~+185H Voltage: DC+12V Current: 400mA Package Size: Approx. 18 * 15 * 7cm/7.1 * 5.9 * 2.8in Package Weight: Approx. 465g/16.4oz Package List: 1 * Receiver 1 * Transmitter 2 * Antenna 1 * Transmitter Cable 1 * Audio Cable 1 * User Manual