3 In 1, 4 LED, Slim Power Failure Light, Turns On Automatically When Power Goes Out, On/Off/Auto Switches, Functions As Night Light, Turns On At Dusk & Off At Dawn, Rechargeable Nimh Battery, Slides In & Out Of Charging Base, Lasts Up To 3 Hours On A Full Charge, Batteries & LEDs Never Need To Be Replaced.