The body of this flashlight is built of high-quality aluminum alloy, and it has a very solid construction. Internal wiring applies the highly efficient booster circuit and can utilize the batteries to the largest extent. Excellent waterproof, suitable for outdoor environments, and adverse weather conditions. Perfect for curing UV resin in a few minutes.Specifications: Emitter Type: UV LED (UV-A)WL (wavelength): 385~400nmUltraviolet luminous intensity: 3mWBulb Quantity: 12LED Lifespan: 10,000 hoursModes: 1Battery Configuration: 3 x AAA batteries (NOT INCLUDED)Input Voltage: 4.5 vRuntime: About 4.5 hoursSwitch Type: Clicky/ClickieSwitch Location: Tail-capLens: Coated Glass LensMaterial: Aluminum AlloyBody Color: blackDimensions (L x Head Dia. x Body Dia.):3.8 x 1.1 x 1 inch /9.5 x 2.9 x 2.5cmWeight: 63g / 1.94ozPackage Includes:1 x 9 UV LED Ultra Violet 385~400nm Flashlight Torch