Specification :     Model: WF-502B     Emitter Type:   10W  LED     LED Quantity: 1     Light Color: White     Battery Configurations: 1 x 18650 or 2x 16340/CR123A(NOT INCLUDED),Suggest 18650     Switch Type: Clicky/Clickie     Switch Location: Tail-cap      Modes: 1(high)     Brightness: 1200 lumens maximum brightness     Input Voltage:3.7V-12V     Lightbulb/LED Lifespan: 100,00 hours     Material : Aluminum alloy     Lens: Coated Glass Lens     Reflector: Aluminum Smooth/SMO Reflector     Dimensions (L x Head Dia. x Body Dia.): 5.39 x 1.25 x 0.86 inch / 13.7 x 3.2 x 2.2cm     Flashlight Weight: 116g / 4.09oz Package Includes:   1 x   1 Mode Flashlight