Creazy&reg;UV WF-501B LED 365NM Ultra Violet Blacklight Flashlight Torch 18650 Light Lamp Flashlight body type: 501B Light source: UV LED LED Brand: CREE Modes: 1 Working voltage: 3.7V-4.2V Battery type: 1x18650 li-ion battery (Not-included) Body materials: Aluminum alloy Reflector: OP aluminum Switch type: Tail Clikie Size: 132mm(Length)*29mm(Diameter)*30mm(Lamp Head)