Safety first, the AMPP400 comes with maximum side visibility, securely held in place with our adjustable FlexTight™ bracket. TECH SPECS Rechargeable headlight (400 lm) Wide beam with OptiCube™ lens technology Excellent side visibility Low battery indicator (Illuminates in red with less than 20% battery remaining) USB rechargeable (Micro-USB cable included) Mode memory function Four light modes (High / Low / Daytime HyperConstant / Flashing) Turns on High mode with double-click of power button FlexTight™ bracket Improved release button has made it easy to remove the light unit from the bracket Helmet mount and center fork bracket (optional) Dimension: 34 x 100 x 37 mm Weight: 117 grams (light unit and battery) Light source: High intensity white LED X1 Run time: High mode 400 lumens: 2hrsLow mode 200 lumens: 4hrsDaytime HyperConstant mode 400/200 lumens: 6hrsFlashing mode 200 lumens: 60hrs Battery: Li-ion rechargeable battery (3.6V-2200mAh) Recharge time: approx 4-8hrs (USB2.0 recharge) Recharge/discharge number of times: about 300 times(until the rated capacity drops to 70%) Water resistant: IPX4 Other: Low battery indicator, lighting mode memory function, Helmet mount / Center fork bracket (optional)