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—240V; Output DC 9V, 300mA Frequency: 315MHz/433MHz Stand-by current: ≤20mA Alarm current: ≤150mA Operating range: up to 150 meters in open place Siren: ≥110db Temperature range: -10 ~ 50 ℃ Relative humidity: ≤ 90% Dimension: 340mmx 250mm x 78mm (Gift box) Net weight: 1.2kg If you would like to look at alarm system, please contact us, we will reply you at the first time. Our security alarm system have own perfect quality, steady performance, reasonable price; Hope we could help you on business. Summer Pan ( export.summerpan at hotmail )