Model: Ultrafire C8-Q2 - Features a Cree Q2 LED Emitter - Brightness: 500lm - Powered by 1 x 18650 battery - Maximum power input: 4.2V - 5-Mode tailcap clicky on/off: Mid > Lo > Hi > Strobe > SOS - Glass lens with textured/OP aluminum reflector Dimensions: 5.51 in x 1.73 in x 1.73 in<img src="http://112.74.112.28/down/products/110049/110049_000.jpg">