Simply plug the PowerOut into any 120V outlet or power strip. When the power fails, the PowerOut emits a pulsing alarm, about as loud as a conventional alarm clock. At the Same time, the PowerOut illuminates a super bright LED to provide safety lighting. The PowerOut can be removed from the outlet and the three-position switch set to “LIGHT” position, silencing the alarm and the super bright LED will provide up to six hours of portable lighting. - Rugged ergonomic and compact case - Plugs into any 120V outlet - Sounds an alarm in a power outage - Use as a power failure light with the alarm function turned off - A green LED functions as a night light and indicates that the unit is powered