... AlarmIn arming status, if the car is vibrated, the siren will sound & system will send out alarm SMS to inform user..Power Failure ... AlarmIn arming status, if the car engine is turned ON, it will trigger this alarm. The siren will sounds for 20 seconds, and ... alarmIn arm status, if the car door is open, it will trigger door open alarm. The siren will sounds for 20 seconds, and ...