Features Reveals hidden urine stains Works on carpeting， wood flooring， concrete， tile， upholstery， and other surfaces Bulb Type: 395-400nm UV LED Small & compact， comes with a nylon wrist lanyard Power by: 3 x AAA batteries (not included)Description Emitter Type: UV LED WL(wave length): 395-400nm LED Quantity: 9 Battery Configurations: 3 x AAA batteries (not included) Switch Type: Clicky/Clickie Switch Location: Tail-cap Modes: 1 Runtime: About 10 hours(depends on battery capacity) Material: Aluminum Alloy Casing Color: Black