SlimLine Power Failure Light.Product Dimensions: 1.0" L x 2.125" W x 5.0" H. The Amerelle LED Slimline Power Failure Lite automatically lights up when the power fails. It can also be used as a 24 hour guide light or a handheld flashlight, simply unplug and the light goes on. It has a retractable plug and a built-in NiMH battery recharges when plugged into the outlet. Amerelle LED Slimline Power Failure Lights a necessity for blackouts, storms, natural disasters and tripped breakers. LED power failure light, Automatically turns lights on when power fails. Can be used as a 24 hour guide light or handheld flashlight. Built-in NiMH battery that recharges when plugged into wall. Energy efficient and long lasting LED’s. A necessity for blackouts, storms, natural disasters, and tripped breakers. UL Approved.