TaoTronics - Enhance Your Life Enjoy life to the fullest with TaoTronics. From industry-leading LED lighting solutions to home goods and audio devices, we put users at the center of our decisions and design products that address life?s needs and help you make the most of your daily activities. Technical Specifications: Dimensions: 2.2 x 2.2 x 5.75 in UV Wavelength: 395 nm Package Includes: 1 x UV Flashlight (Model: TT-FL002) 3 x 1.5V Battery, Type AAA 1 x UV-safety glasses 1 x instruction manual Notes: If the flashlight does not turn on, please check batteries and battery case are installed with correct polarity The light works best in dark environment; the more dark it is, the better it works Can only spot dried urine stain Does not work on reflective surface or carpet with fluorescer For few dark color carpets, the reflected stain color will be very close to the color of the carpet, making it harder to see