GPS car tracker with car alarm We are the manufacturer of car alarm system and GPS tracker products, we have been on this business for more than eight years, we can supply OEM service for our clients, our products sell all over the world. Brief Introduction This GSM+GPS car alarm is an advanced car security product developed by our company. It takes advantage of mobile phone networks to tackle any problems; it always enables you to keep in touch with your car conveniently. You could easily supervise, protect & control your lovely car anywhere at any time, it provide the most cost-effective protection service for users. Features 1) Audio alarming by phone & siren, and send position information to user by SMS 2) Car positioning function 3) Vibration, door opening, power-off, emergency alarm 4) Remote listen in, broadcast, cut off gas/power to stop car by phone 5) Remote arm or disarm, lock or unlock car door by phone or transmitters 6) Remote arm/disarm by phone 7) Phone call the car to get real time car conditions 8)Transmitters with code-hopping technology, impossible to decode or copy 9) Automatic door closing upon braking and light warning upon getting off the car 10) Adjustable 8-scale vibration sensitivity, audio alarm and mute alarm model 11) Car phone function 12) Remote starter of engine or air-conditioner (optional) 13) Wireless immobilizer can be added (Optional) Parameters: 1. Averageworkingvoltage:DC12V+2V 2. Alarm-received telephone numbers:4; Anti-theft:2; Anti-hijack:2; 3. Sensitivityofvibrationsensor:8scales; 4. WorkingfrequenciesofGSMmodule: 900MHz/1800MHz/1900MHz; 850MHz/900MHz/1800MHz/1900 MHz. (Optional) 5. Static Current condition:≤50mA 6. RF frequency:433MHz(or315MHz) 7.Temperature:40to+70 Centigrade Degree 8. Size of main Unit: 114mm*33mm*100mm