21 "top quality ultra-violet LED bulbs allow the torch to cover a large area Water resistant design & a rope & tail cap press on /off, easy to carry and use. 3* AAA batteries powered (included). Emits 395 to 400nm wavelength,makes the light ideal for field work and make the hunting work easier. Perfect for revealing hidden pet stains of dogs, cats and other pets on carpets, also works great for outdoor uses like Spotting scorpions in the wood