iEnergy 385 nM 51 UV Ultraviolet LED flashlight Blacklight 3 AA Bulb Type: Longwave UV LED, 380-385 nM Almost has no visible light. Yet, Very Powerful in UV Battery Require: 3 x AA Alkaline Battery (Not Included) Weight: 8 oz. Head Diameter: 2.15" or 55 mm Body Diameter: 1.38" or 35 mm Length: 5.5" or 140 mm