Teledex Sentina 4-in-1 smart light- Built-in bright 3-LED lights will last a lifetime- Built-in NiMH rechargeable battery for unlimited power- 4 Valuable functions in 1 compact unit: motion detector light, power failure light, emergency 3-LED flashlight, and automatic power on at dusk and power off at dawn- Saves on energy costs and also is a superb safety and emergency toolTELED92M