Features:_x000D__x000D_LED indicator shows power out / failure alarm and power condition. _x000D_The siren alarms when the power supply is cut off until restore power. _x000D_The warning could be manual muted by on/off switch. _x000D_Drawer-type cell cover design, can change the battery easily. _x000D_High voltage resistant design, works fine even when power voltage exceeds standard. _x000D__x000D_Specification:_x000D_Plug: CN Plug_x000D_Voltage: AC 220V_x000D_Color: White_x000D_Battery: 9V Battery (NOT included)_x000D_Alarm Volume: 120db_x000D_Cable Length: Approx. 55cm/21.7inch_x000D_Size: Approx. 10*5.3*2.5cm/3.9*2.1*1inch_x000D_Weight: Approx. 100g / 3.5oz_x000D__x000D_Package List:_x000D_1 x Power Failure Alarm_x000D__x000D_Note: _x000D_1.Please kindly make a note if you need any plug adapter._x000D__x000D_2.Dear customer, Please rest assured to buy without worrying about the plug adaption. We will provide an adapter for you according to different country standard and ensure its normal use. 1LED indicator shows power out / failure alarm and power condition. 2The siren alarms when the power supply is cut off until restore power. 3The warning could be manual muted by on/off switch. 4Drawer?type cell cover design, can change the battery easily. 5High voltage resistant design, works fine even when power voltage exceeds standard.1x PowerFailure Alarm