The TE-2PSK has everything built into the sensors with no additional control modules or parts needed, resulting in an easy to install kit, that does not require drilling into the bumper - simply mount the sensors and run wires. A 3-zone setup for audible alerts helps drivers navigate difficult parking situations with ease. Designed for rear plastic bumpers. (May be used on the front with additional wiring - modifications may be required depending on the vehicle and ability to mount to the bumpers.