This UV flashlight uses a 3W high-power violet UV LED with a wavelength of 365nm. It has an integrated reflector cup and an aluminum metal body. The flashlight is powered by one 3.7V 14500 or AA type battery, which is not included. It features a tail push switch and a tail rope for easy carrying. The UV light can be used to detect fluorescent substances, such as blood fingerprints and other body fluids, and is suitable for various industries, including forensic and detective work.