Go Bright Rechargeable 1200 Lumen Rechargeable Road, Mountain Bike Headlight, New 6400 mAh Battery-3 Plus Hours on High Beam with Free Taillight EXTREMELY BRIGHT 1200 lumens Mountain, Road Bike Headlight, Upgraded 6400 mAh silicon Waterproof Battery with a runtime of 3.5-4 hours on high beam, up to 6 hours runtime on medium. SAFETY- This light also offers a strobe and S.O.S light for daytime use for up To 24 hours EXTERNAL SILICON RECHARGEABLE BATTERY -New double strap battery holder included. BEST BIKE LIGHT SET for BIKING/MOUNTAIN BIKE/CAMPING/HIKING/RUNNING with included Headlamp Accessories. 1 YEAR GUARANTEE ON BICYCLE HEADLIGHT/ 1 YEAR WARRANTY ON BATTERY - EASILY INSTALLS IN MINUTES-Quick Release for Anti-Theft. 3 LED TAILLIGHT/ full size with 3 modes and 500 ft Visibility/ WATERPROOF