Feature: Using ultraviolet UV LED high-power violet Wavelength: 395-410nm Battery: use one 3.7V 14500 or AA type batteries(NOT INCLUDE) Tail push switch , Portable easy to carry Uses: Mask, skin care products, baby clothes, diapers, sanitary napkins, toilet paper and other daily necessities of life, money detector, night fishing, according to drift, according to the prayer beads, according to traces of forensic class of special purpose industries use UV can be used to detect fluorescent substances: wavelength 395-410nm UV blood fingerprints and other body fluids can be used, shot residue testing Package Content: 1 X UV Flashlight