Fenix Flashlights BTR20 800-Lumen Rechargeable Bike Light, Grey Max 800 lumen output from rechargeable battery pack (included) Five brightness levels-Turbo-800 Lumens (2hrs), High-400 Lumens (4hrs 40 min), Medium-200 Lumens (10 hrs), Low-80 Lumens (23hr) and Flashing Mode Simple operation including instant Turbo with the remote pressure switch IPX-6 Waterproof, 1 meters for 30 minutes Supported by limited lifetime guarantee from Fenix Lighting, US