Specification Brand: UltraFire Model: WF-501B 1 Mode Emitter: 3W UV LED Bulb Number: 1 Color BIN: Violet Total Batteries: 1 OutPut (W): 3 Color: Black Material: Aluminum alloy Wave Length(nm):395-410 Switch Location: Tail button switch Service Life: 50,000hrs Special Features: Water resistant Battery Configuration :1* 3000mAh protected 18650 rechargeable battery (not included) Working Voltage: 3.6-9V. Dimension (CM): 10 x 9 x 10 Package Contents: 1 x Flashlight Notice: Please do not irradiate it to human eyes, especially for children, or else, it may cause temporary blindness for the harsh light of flashlights. Do not meddle with the head of torch or separate the reflector and the bulb.