Check the listing for details. Shock Sensor for Car Alarms UNIVERSAL ShockSen. Condition: New. Listed at 8.79 USD. ALL our products are BRAND NEW UNIVERSAL Single Stage Shock Impact Sensor for Car Alarms ShockSenSS This shock sensor can be wired to most alarms using the 3 wires. Plugs-in direct to alarm or hard-wired. This is ideal to stop anyone knocking your car, as a full impact will trigger the alarm. Its small size allows the Shock Sensor to be mounted almost anywhere. Easy to connect (either plugs in or hardwired) into your alarm, the shock sensor is connected to the alarms main sensor input and is then set to protect the interior of the car, triggering the the full alarm if it is activated. 12v Universal Shock sensor Fully Adjustable for optimum sensitivity LED to assist in sensitivity adjustment Negative Trigger Output, Compatible with any alarm with a negative trigger input. Connects to alarm's Negative (-) trigger input, Unit have a 3-pin input to main system, can also be hardwired. Quality Products at fantastic prices! Wiring: Black: (-) 0v Connect to Ground Red: (+) +12v Blue: (-) Connect to instant trigger Aux-negative input of alarm (Alarm) trigger OR (Warning) trigger. Package Contents: 1x Shock sensor with attached cable. Instructions