description: 1. Material: Made of high-quality aluminum alloy, light and durable. 2. Power supply: 3*AAA batteries or 1* lithium batteries can be used, you can choose freely according to your preferences. 3. Lens: Convex lens with anti-reflection coating. 4. Anti-skid: The knurled design on the handle makes the anti-skid firm. 5. Suitable for: medical equipment, disinfection and sterilization, crack detection, animal urine inspection, jewelry and jade inspection, currency inspection, etc. specification: Name: Ultraviolet zoom flashlight Colour: Black Voltage: 3.7V Input: DC5V Battery: 1 * battery or 3 * AAA (not included) Wavelength: 395nm Lighting mode: 1 file Service life: 120,000 hours Use time:> 14 hours Waterproof grade: IP65 waterproof Size: 128*27*31mm Net weight: 145g Gross weight: 167g Packing method: bubble bag + white box List: Package A: 1*Flashlight, 1*Anti-lost rope Package B: 1*Flashlight, 1*Anti-lost rope, 1* battery, 1*charger Tips: 1. Due to manual measurement, please accept an error of 1-3 cm. 2. Due to the difference of light and sn, the color of the product may be slightly different from the picture.