Sure to dazzle every night riding MTB rider, with thunderous good reason!!! The TSL-T1000 is a standout for its super light weight and compact head due to its CNC/aluminum construction. What truly sets this 1000 lumen headlight apart from the competition? Integrated into the small battery pack is our award winning Thunderbolt taillight (35 lumens), where you can strap it up to your seatpost for practicallity or facing down on your toptube to be unique. Other features include a USB outlet integrated into the battery pack for on-the-go accessories charging. Features Max Lumens: 1000 Thunderbolt Taillight Integrated into Battery Pack Run Time: HEADLIGHT Only: Overdrive: 2 hours (1000 lumens); High: 3 hours and 10 minutes (650 lumens); Medium: 4 hours and 15 minutes; Flashing: 10 hours and 15 minutes. TAILLIGHT only: High Flash: 67 hours and 50 minutes; Low Flash: 108 hours (20 lumens); High Solid: 24 hours and 25 minutes (35 lumens); Standard Solid: 68 hours (20 lumens); Low Solid: 98 hours (10 lumens): HEAD and TAIL both on: Solid High: 2 hours and 5 minutes; Solid Low: 17 hours and 30 minutes Modes: Headlight: Overdrive, High, Medium, Low and Flash; Taillight: High Flash, Low Flash, High Solid, Standard Solid, Low Solid Weight: Headlight body: 80 grams; Battery Case: 140 grams. Taillight body: 80 grams. Charge Time: 4 hours Mounts included: Universal Handlebar Mount; Universal Helmet Mount Includes: Wire Switch, Extension Cable, Wall Charger and Ballistic Nylon for storage. Ram Air Cooling for Increased Brightness and Longer LED Life Wired Remote Switch for on-the-fly mode changes