Weltool M2-BF Ultraviolet (UV) Professional Flashlight 365nm Wavelength UV-A LED 1 *18650 Battery (Included)

M2 UV flashlight is also called black light, adopts high efficiency pure 365nm UV-A LED with the LED radiation flux of 2060mW. The flashlight body is compact with a steel clip included as an accessory, powered by 1 piece of Li-ion battery, compact and portable. The visible wavelength range to human eye is 400-700 nm, while the dominant wavelength of the M2 flashlight is 365 nm with less visible light, so the M2 is not "bright" in eyes and it's not designed for use of illumination. From which it proves that it's pure 365 nm wavelength with a better performance than the ultraviolet light of other wavelengths (380-400 nm). M2 "Purple Beard" is a professional-grade UV detection flashlight, which is more suitable for professional fields:UV curing: Some curable adhesives specify the 365nm UV for rapid curing, M2 UV flashlight can also be applied to ink curing field, such as printing, oil painting and wood instrument processing.Forensic investigation & evidence collection: Proteinaceous