Check the listing for details. UNIVERSAL DUAL STAGE Shock Impact Sensor for Car Alarms. Condition: New. Listed at 10.25 USD. ALL our products are BRAND NEW UNIVERSAL Dual Stage Shock Impact Sensor for Car Alarms ShockSenDS The dual stage shock sensor effectively works like two separate sensors. The first "stage" or "zone" is set to be more sensitive and is usually connected to the "warn off" feature found on many alarms, or a separate buzzer. The second stage 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 electronic dual stage shock sensor Fully Adjustable 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 4-pin input to main system, can also be hardwired. Two zones - one for warning, one for alarm trigger Quality Products at fantastic prices! Wiring: Red: (+) +12v Black: (-) 0v Connect to Ground White: (-) 1st Stage (Warning) trigger (negative) Blue: (-) 2nd Stage (Alarm) trigger (negative) Package Contents: 1x DUAL STAGE Shock sensor with attached cable. Instructions OTHER ITEMS: *see Notes below Electric Boot Release Siren Window Closure Cable door lock adaptor Central Locking Motors VW T4 Sliding Door Immobiliser Relay Shock Sensor Transponder Bypass Notes * Note 1. Cable operated door locks For vehicles with cable operated door locks, such as Ford, Mercedes Sprinter/Vito, and some newer cars, You need this additional item: Allows aftermarket actuators to work with cable door lock systems Cable door lock adaptor Note 2. Total Closure / Window Closure If your vehicle has total closure this kit will close the windows without any additional interfaces. You can tell if your vehicle has total closure if the windows close when you hold the drivers door key in the locked position. If you don’t have total closure and want to close the windows when the alarm is armed; then you will need a window closure module. Note 3. Boot Release Wire: Trunk Release Output Some cars have an electric boot release or one can be added. This can be interfaced with this kit. For cars with a built in boot release the wire is found at the keyless entry module under the dash or behind a kick panel. If you want to Convert your manual boot release to electric release; then you will need a Electric Boot Release Kit