Wireless Transmitter&Receiver , never usedAn 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 connectionsInput: DC 9-14VTransmitter/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 ShownMaterial:plasticPackage Contents:1 x wireless transmitter module1 x wireless receiving moduleOnly 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.