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.Specification:Plug: CN PlugVoltage: AC 220VColor: WhiteBattery: 9V Battery (NOT included)Alarm Volume: 120dbCable Length: Approx. 55cm/21.7inchSize: Approx. 10*5.3*2.5cm/3.9*2.1*1inchWeight: Approx. 100g / 3.5ozPackage List:1 x Power Failure AlarmNote:1.Please kindly make a note if you need any plug adapter..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.