... remote controls, GPS antenna, 1 dialer, 1 shock sensor, 1 siren, 1 speaker, 1 relay, 1 emergency help switch, 1 LED ... , shock, power off Etc)Emergency help switch. This GPS GSM car alarm system will dial the emergency help number automatically, and send ... trunk releaseAuto central locking system.GSM cell phone carrierGPS GSM car alarm will send SMS to cell phone to show the position ...