Mr Beams MB240 ReadyBright Wireless Power Outage LED Lighting System - Starter House Kit (Includes 1 path light and 1 ceiling light + detector) Only MB240/MB220 rechargeable flashlight includes a rechargeable battery Automatically detects a power failure and provides up to 40 hours of bright light Simple wireless installation - no electrician needed Light can be controlled by the remote for maximum safety, convenience and battery life Power Outage Detector is a remote and a flashlight Auto shut off to conserve battery life and to turn the light off automatically if no one is home Only the rechargeable flashlight includes a rechargeable battery