High Powered 3-Watt 375nm Ultra Violet UV LED Flashlight for forensic work Comes with a lifetime warranty if purchased through Arizona Tactical Gear Voltage Range 3-6 volts. Powered by 2 x CR123 or 1 x 18650 Detect Ultraviolet fluorescence dye Use to find urine, semen, and saliva stains / Or for checking documents or IDs with UV dyes built with aircraft-grade aluminum alloy / shock-proof & drop-proff