Car GSM Alarm SP800S Features SP800S--GSM 900/1800MHz SP800SA--GSM 850/1900MHz GSM car phone carried All functions of car alarm Built-in high capacity backup NiH battery Designable friendly languages instruction Check the status by phone Message or voice to arm or disarm Call up 3 phone numbers and message once triggered Instant message and call once illegally triggered Monitor by microphone Shout by speaker Cut-off power to stop a car by phone Broadcast ring number Record hackers' phone number Remote engine start by phone or transmitters Press-a-button to auto call for emergency help