Specification: Aluminum flashlight Rated Operational Voltage: 7.4V Rechargeable time:4 hours Dischargeable time: 3 hours Brightness: 130 Lumens Use"18650" or 2* "CR123" Batteries LED:CREE-3W LED Function: 100%-0 100%/50%/25%/Flash/SOS/OFF Length: 142.35mm Diam: 38mm Visible distance: 300 meters The life of LED: 100,000hours