1,Invisible But Powerful 365nm Light: The 10W high power ultraviolet 365nm light is invisible to the naked eye, so it is not as bright as a 395nm flashlight, but is more suitable for demanding detection such as fluorescence reactions and safety codes. 2,Completely Different Levels of Light: 365nm UV flashlight is a truly detection with almost no visible light leakage. 3,Wide Range of Applications: A must have multifunctional 365nm UV blacklight flashlight in daily life. AC leak detection with ; Cured UV resin and green oil; Luminous UV spraying Item Type: UV Flashlight Material: Aluminum Alloy Weight: Approx. 117g Light Source: UV Blacklight Control: Button Control Power Supply Battery: 1 18650 Lithium Battery (Not Included) Lamp Cap Diameter: Approx. 28mm / 1.1in Shrink Length: Approx. 132mm / 5.2in Elongation Length: Approx. 142mm / 5.6in