Feature:1. 365NM INVISIBLE LIGHT: The 365nm light is not visible to the naked eye, making it less bright than a 395nm flashlight. Perfect for detecting fluorescent agents, and other high demand applications.2. DETECTION SPECTRUM: The 365nm light is a true detection spectrum. It can be used in natural light and performs better in almost complete darkness without any visible light leakage.3. LONG RUNTIME: The 650mAh rechargeable battery can run for up to 6 hours. It can be charged using any USB output or with the included Type C USB cable and fully charges in just 3 hours.4. COMPACT AND VERSATILE: Lightweight and portable. Easy to fit in your pocket, backpack, toolbox, or your car. Suitable for various surfaces in living rooms, kitchens, bathrooms, bedrooms, garages, and cars. Point out annoying spots around you anytime, anywhere.5. ADJUSTABLE FOCUS: Zoom in out to adjust the appropriate light range. Zoom in the beam to surround suspicious areas, zoom out to mark pet urine. Made with a premium aluminum alloy body for durability.Specification:Item Type: Back light flashlightMaterial: Aluminium alloyWeight: Approx. 86g / 3ozHead Diameter: 25mm / 1inLength: 90 to 102mm / 3.5 to 4inBattery: 1x16340 lithium battery 650mAh(included)Light Source: UltravioletLight Wave Length: 365nmControl: ButtonCharging Interface: USB Type C.Package List:1 x Flashlight1 x USB Cable