Car GSM Alarm SP800N Features SP800N--GSM 900/1800MHz SP800NA--GSM 850/1900MHz GSM car phone carried All functions of car alarm Designable friendly languages instruction Voice to arm or disarm Call up 3 phone numbers once triggered Instant call once illegally triggered Monitor by microphone Shout by speaker Cut-off power to stop a car by phone Press-a-button to auto call for emergency help