This system senses the rotation of the drive axel and calculates the distance travelled in a vehicle. 

Includes all of the following:
(1X) Control Assembly, Plug and Play - Power, Sensor, Lights (Includes 3" Touchscreen Display)
(1X) Cable Assembly, Photoelectric Proximity Sensor / 4Pin Connector, 22FT
(1X) Cable Assembly, 12VDC Cigarette Lighter / 4Pin Connector, 3FT
(1X) Value Signal Mounting Bracket - Cup Holder