Light source   :USA imported CREE Q5 LED
Brightness      :350lumens
Power            :3w
Material          :6061-T6 aviation aluminum
Size                :195mm,48mm,27mm
Power source :1*18650 rechargeable Li-ion battery or 2*16340 battery or 2*CR123 battery

Runtime          :3-5hours
Distance          :300-500meters
Waterproof      :Ip67
Modes             :5modes (High>Middle>Low>Strobe>SOS)