,High quality Easy installation Take one minute get your camera become a wireless camera Wireless 2.4GHz transmitter/receiver set (12-24V-Volt for vehicle installation) Work Range:Up to about 200m(Hollowness) Connects to rear-view camera and front video screen Fit all 4Pin composite video connections Power: DC 12V-24v Transmitter/Receiver Cable Length:1.5m This Device is for Car Rear view Monitor,it usually used for truck, it is wireless connector,it is waterproof.can be installed easily. 2.4G 200mW Wireless Video Transmitter & Receiver Power Supply DC9V-24V Consumption Current 150mA T/R Frequency 2.2G~2.3G~2.4G Output Power 200mW Unobstructed Effective Range 150 ~ 200 m Operating temperature -10c ~ +50c Transmitter Dimension L8cmxW4cmxH2cm Receiver Dimension L8cmxW4cmxH2cm Material:ABS colour:White Package Contents: 2 * Wireless Transmitter&Receiver (Aviation head) Only the above package content, other products are not included. Note: Light 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.