Description: Includes 4 sensors. Cool silver shown. Requires Park Assist ECU.. Be more confident parking anywhere with this system that alerts you to things that may be behind your Outlander. Back up with confidence. If they find one, the system emits a series of beeps that get faster as you move closer. If you are within a foot, the beeps change to a steady tone. When you place your Outlander in reverse, these sensors can detect objects less than four feet away.