... when you forgot to arm, hierarchy management for alarm zone.6.Arming/Disarming by remote controller.7.SMS ... , beautiful appearance, small size, wireless remote control, GSM/GPRS MMS/Email/SMS alarm, emergency call, 1channel relay output ... , lithium battery interface. Size: 212mm×162mm×39mm Product photoFactoryWorkshopOffice color gsm home security alarm system ...