Anti-theft GPS/ GSM/GPRS module with shock sensor and vehicle listening

DIY by adding shock sensor to a GPS module with call back function (GSM phone) .

 Shock sensor will notify you at once. False alarm is prevented by the processor of the Shock sensor (not shown here). The processor will  analyse the shock amplitude and the frequency of the shock. A preset algorithm will decide whether that is a real attack. In addition , a sensitiy knob can be adjusted for addition tunning of the sensitivity.

One can remotely listen to the vehicle environment for suspicious attack.  GPRS based has GPS  fence guarding but it may be too late if the vehicle is already stolen and moved away.

Lithium backup battery with auto-recharge, that is completed separated from the vehicle main battery.