Feature 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.SpecificationFeatures: 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 Plug Voltage: AC 220V Color: White Battery: 9V Battery (NOT included) Alarm Volume: 120db Cable Length: Approx. 55cm/21.7inch Size: Approx. 10*5.3*2.5cm/3.9*2.1*1inch Weight: Approx. 100g / 3.5oz Package List: 1 x Power Failure Alarm Note:1.Please kindly make a note if you need any plug adapter. .wang-edit-text{ font-family:'Arial' important; } .wang-edit-text table { border-top: 1px solid 000; border-left: 1px solid 000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid 000; border-right: 1px solid 000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }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.