Description 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