wireless alarm system Description: 8 LED display of defense zone Build-in dialer with build-in siren Telephone line anti-cut function Record your own personal message for ten seconds Up to 6 telephone numbers can be pre-stored in the unit and dialed to summon help in priority order. Remote command and access to the system from anywhere via a telephone/mobile Emergency/panic button is available for 24 hours whenever arm/disarm Back-up rechargeable battery available for 36 hours when power is in failure Able to link up to the networks of alarm center through an ID code Parameter: Power supply: Input AC 110V; 220V; 230¡ª240V; Output DC 9V, 300mA Frequency: 315MHz/433MHz Stand-by current: ¡Ü20mA Alarm current: ¡Ü150mA Operating range: up to 150 meters in open place Siren: ¡Ý110db Temperature range: -10 ~ 50 ¡æ Relative humidity: ¡Ü 90% Dimension: 340mmx 250mm x 78mm (Gift box) Net weight: 1.2kg If you wwant to get more informations about wireless alarm system, please contact us, thanks. Dimension: 340mmx 250mm x 78mm (Gift box) Net weight: 1.2kg