Features: 2 in 1 functions: Bicycle light+Head Light Made of CREE XM-L T6 LED, ultra bright Output bright comes to max 1200 lumens 4 switch modes: Strong Brightness, Normal Brightness, Weak Brightness and Strobe( press button for 3 second) Rechargeable 4400mA battery offers powerful power supply Aluminum alloy casing, waterproof design, long service life Equipped with an elastic & adjustable headlamp band and 2 plastic rings, very convenient Suitable for cycling, climbing, fishing, hunting, camping and other outdoor activities Specification: Model: T6 Casing: Smooth Light Head Shell made of Aviation Aluminum Alloy, CNC machining, anodizing surface treatment Color BIN: White Total Emitters: 1 Battery Configurations: Powered by a rechargeable 8.4V 4400mAh lithium-ion battery pack (4x 18650 Batteries; Battery overcharge protection) Voltage Input: 8.4 V max Switch Type: Clicky (Clickie) Switch Location: Tailcap (Tail-cap) Modes: 3 Mode Arrangement: High > Mid > Weak > Fast Strobe Brightness: 1200 lumens maximum brightness (manufacturer rated) Runtime: Up to 3~4 hours run-time at 100% brightness (manufacturer rated) Reflector: Plating Smooth Reflector Lens: Glass Water Resistant: Yes, light and battery pack can work in rainy days Package include: 1 x XM-L T6 LED Bicycle Light 1 x Adjustable headband 2 x Rubber ring for installation 1 x 4400mAh Battery Pack 1 x AC charger (100-240V) 1 x Plug Adaptor (if need)