Bicycle Parts Specifications: USB fast charge , compatible phone, computer, other charger at the same time Built-in 30 over drive COB Lamp beads , more than 100 Lumens , make sure the brightness Rechargeable LI-battery 3.7C 500mA ABD QUICK release handlebar mount fit for 22-31.8mm,no other install tool needed Huge battery capacity up to 500MAH,5H for the single color Head light Anti-proof design, worry free in rainy ridding or accidental water Smart charge LED light , red and blue and flash LED for Charging , done, and low power Anti-slipping rubber , exclusively for bicycle handlebar Specifications: Flash Light 6 Modes (Single Head Light): standard / high beam / over drive / 50% brightness / 100%brightness flashing / strobe flashing / close Size:8.4 x 2.8 x 1.7 mm Rubber Band for Handlebar: 22-31.8mm Note: 1.when the indicators turns flashing orange,it means low power 2.press power button to change the modes 3.do not control any part under water Package Include: 1 x Head Light 1 x USB Cable 1x Headbar Rubber Band