The Back-Up Sensors will help you ease in and out of parking spots you previously may have passed over as too small. Help yourself in or out of a tight spot, while helping to protect your paint (and the paint on other people’s cars too). • Color-matched to your vehicle. • Four sensors emit audible beeps into the cabin while you back up, signaling objects as you approach them. Those beeps quicken as your vehicle gets closer to objects. • On/off switch is mounted to the interior on the “D” pillar, to silence the system when you don’t want to use it. A separate Back-Up Sensor Attachment is required for installation.