Without installation of wires and cables, DIY project Record message for ten seconds Program six groups of telephone numbers Auto-call stored telephone numbers circularly and simultaneously with alarm messagewhen alarm is triggered Mute alarm and audible alarm is at user's option Separately arm/disarm for the certain detected areas Back-up rechargeable battery available for 36 hours when power is in failure Add or reduce additional spare parts to the main panel is according to user's optionOptional spare parts refer to our alarm accessory in our website Can link up to the networks of alarm center through an ID code Working frequency: 315MHz/433MHz Power adaptor: Input AC110V, 220V; 230-240V; Output DC 9V, 300mA Working temperature: -10 to 50deg. C Working atmosphere pressure: 86 -106Kpa producing area:China payment:T/T