Cateye AMPP 800 Helmet Mount VersionThe Cateye Ampp 800 features a strong and compact construction with a powerful 800 lumen brightness output. Plus, it’s USB rechargeable and charges fast while providing a long battery life with a three-level battery indicator. Additionally, this version features a secure and adjustable helmet mount that enables the light to illuminate the terrain in any direction you look.Specification: Dimension: 32 x 102 x 33 mm Light source: High-intensity white LED X1 Run time: High mode 800 lumens: 1.5hrs Middle mode 400 lumens: 2hrs Low mode 200 lumens: 4hrs Daytime HyperConstant mode 800/200 lumens: 4hrs Flashing mode 200 lumens: 30hrs Battery: Li-ion rechargeable battery (3.7V-2500mAh) Recharge time: approx 3-7hrs (USB2.0 recharge) Recharge/discharge number of times: about 300 times (until the rated capacity drops to 70%) Other: Three-color battery indicator, lighting mode memory function and Helmet mount Weight: 136 grams (light unit and battery)Features: High power rechargeable headlight (800 lm) Powerful wide beam with OptiCube lens technology Excellent side visibility Large capacity lithium-ion rechargeable battery Built-in fast recharging circuit *Full charge in approx 3 hours (minimum) 3-level battery indicator (Blue: Above 50% Yellow: 30-50% Red: Less than 30%) USB rechargeable (Micro-USB cable included) Mode memory function Five light modes (High / Middle / Low / Daytime HyperConstant / Flashing) Turns on High mode with a double-click of the power button Helmet MounttBuy Cateye Accessories from Chain Reaction Cycles, the World’s Largest Online Bike Store.