Weight:717g Dimensions:2.17in*2.24in*2.17in(5.5cm*5.7cm*5.5cm) Brand:UltraFire Model:U-L2 Emitter Brand:Cree Emitter Bin:XM-L2 T6 Color Bin:Cool White Quantity:1 Material:Aluminum Alloy Color:Black Total Emitter:7 Modes:3 Mode Arrangement:Hi>Lo>Fast Strobe Mode Memory:No Reflector:Aluminum Smooth Reflector Lens:Glass Battery Configuration:4*18650 Batteries(two parallel two series) Capacity of Battery Pack:4400mAh Battery Included:Yes Beam Range:250m Luminous Flux:4000lm Runtime:2hrs Circuitry:2800mA Working Voltage:7.2-8.4V Switch Type:Reverse Clicky Switch Location:Tailcap Mounting Position:Handbar or helmet Strap:No Clip:No Features:Hard-anodized Body Packing List:1* Bike Light with Cable(70cm) 1* Battery Pack with Cable(60cm) 1* 2-Flat-Pin Plug Power Adapter(110cm 100-240V 50/60Hz) 1* Headband(50-80cm) 2* Rubber O-rings<img src="http://112.74.112.28/down/products/420238/420238_000.jpg">