Complete Double Guard Alarm Shock Sensor module has 36" long wires with 4 slot female connector to plug into most car alarms. This is similar to the 504D and uses IC and electromagnetic circuitry to provide Double Guard technology. Has sensitivity control that can be set to the sensitivity that you desire. It has 2 "guards". The first one illuminates a green "LED" and operates your relay momentarily when a minor tap or light impact is felt. The second output and red LED activates momentarily when a hard impact has been sensed. Note: No relays are included. The shock sensor is reliable, operates on 12VDC and draws very low current until activated. Size of module is 1-5/8" x 1-5/16" x 3/4". Wiring is as follows: +12V (Red), -12V (Black), Low Impact (Green) - Goes to one lead of relay coil, and the other lead of coil goes to (Red +) and Blue goes to Hard Impact relay coil and other lead of relay coil goes to (Red+). Brand new. Very interesting device! Retails up to $29.00 and higher. YouTube - Product Video
