Besides controlling your car the conventional ways using the remote controller to arm, disarm, it has many more functions and IT CAN REMOTELY CONTROL YOUR CAR USING THE MOBILE PHONE OR ANY PHONE FROM ANYWHERE IN THE WORLD and alert you when there is a intrusion via SMS and or call you. Using mobile phone or any phone - You can arm & disarm the car by phone call &SMS; - You can lock and unlock the door by phone call; - You can inquiry what is the car status when you dial into the GSM Car Alarm i.e. whether the alarm in on or not, or is the door is open or not, or if the engine is started, etc, etc. - You can remote start your car engine & air-conditioning by phone call &SMS (on a hot day, you will find it is most comfortable to enter your car, cool & nice.) - You can immobilize your car anytime anywhere to prevent hijacking by phone call &SMS - You can switch on or off your vibration sensor (with 8 levels of sensitivity adjustment) and it is programmed to distinguish between a real or a false alarm before it sms or call you. - You will be sent SMS or called up when a intrusions occured by burglars within senconds - You will be called up with a voice prompt giving full details of the instrusion and tell u what further action u should take; - The system can be set to silent mode whereby no siren will be on but just SMS & call you when there is an intrusion, this mode is use so as not to alert the intruder. - It is also equipped with a normal wireless keypad for you to dial out as normal mobile phone using the hand free kit - It can do a voice broadcast and or monitoring-listen in; - It is also equipped with an internal back up battery. Should the intruder able to disconnect the power supply & disconnect the siren, the GSM car alarm will senses it within a split second as a matter of fact & within a few seconds it will instantaneously send a SMS and or call the car owner. (3 preset numbers) - Automatic door lock after 15 seconds when: 1) engine started; 2) all doors are closed 3) brake pedal is depressed. This function will repeat when & after any door is opened and closed. - It has a very discreet emergency button which is black in color and wafer thin. - Access into the GSM CAR ALARM SYSTEM, you need to have the phone number & the password & then you will have total access to your car.