They use a 1/3" Sony CCD sensor and this is aided by high quality circuits for processing the signal. It has 12 IR LEDs to help with the night vision. It is designed to fit the vertical wall at the rear of a vehicle with the cable fed into the body underneath the dome. It uses the 4 pin aviation style connector and we have a number of kits available that use this camera. It should be noted that when on a vertical surface the camera when adjusted down sees withiin about 1 foot of the vehicle bumper.
Please note if you are replacing one of these on an Eldis motorhome they have used 2 different types of connector. One is the 4 pin aviation this camera uses and the other based on a push fit S-video connector. If yours is the S-video style we can provide support if you contact us.