... network for alarm transmission.Premium design with LED display, build-in touch keypadCompatible with GSM network, reports alarm events by ... keypad(optional device), phone call.Arm/Disarm alarm system with siren (sound & flash) on/off remindNon-volatile chip ... Adapter Required Batteries, Fixing & Screws,(Hardwired zones connector with EOL resistor,Telephone-line). Alarm System Technical Information: ...