Home Alarm Systems descriptionsWe use high-quality raw materials, all materials are very suitable for the product, please rest assured to buy.Automatic Power Cut Failure Alerter, Led Indicator Outage Alarm Warning Siren.Features: LED Indicator Shows Power out / Failure Alarm and Power Condition.The Siren Alarms when the Power Supply is Cut off Until Restore Power.The Warning Could Be Manual Muted by On/off Switch.Drawer-type Cell Cover Design, Can Change the Battery Easily.High Voltage Resistant Design, Works Fine Even when Power Voltage Exceeds Standard.Specifications: Voltage: AC 220V Battery: 1pcs X 9V Battery (NOT Included) Alarm Volume: 120db Cable Length: Approx.85cm/33.5inch Size: Approx.10*5.3*2.5cm/3.9*2.1*1inch Weight: Approx.100g / 3.5oz Package Includes: 1 X Automatic Power Cut Failure Alerter .Products number : SOMONO95835