Wireless Transmitter&Receiver , never used An advanced wireless module that enables normal reverse camera to become wireless Easy to install and operate. Wireless 2.4GHz transmitter/receiver set (12V for vehicle installation) Work range: up to about 50m(Hollowness) Fit all RCA composite video connections Input: DC 9-14V Transmitter/Receiver cable length: . 1. How to Install a Camera with the Wireless Module: 1.Take out your license plate light at the back of your car. 2.Fix the camera to where the license plate light . 3.Connect the built-in license plate light of the camera to where the license plate light connected to the power. 4.Connect the wireless module (transmitter) to your camera via the two cables - one plug for AV output plug for power. 5.Connect the wireless module (transmitter) to the reverse light of your car to the power - red wire for positive and black wire for negative. 6.Connect the wireless module (receiver) to your car monitor - yellow plug for AV input. 7.Connect the wireless module (receiver) to your car battery or lighter to the power - red wire for positive and black wire for negative. 8.You will see the images on monitor or DVD when your car is in reverse shift. Colour:As Shown Material:plastic Package Contents: 1 x wireless transmitter module 1 x wireless receiving module 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.