Make invisible visible 395nm wavelength can help detect things invisible to the naked eye, such as dog urine/stains, verifying currency, driver's license, passport, customs or gas leak inspection. 2 Pack of Black Lights is enough for your daily activities and also great for sharing with others.Save time and money No need to clean the whole carpet, use this flashlight to detect the exact location of statins or urine, it will point out the area you want to clean, save your time and money greatly.Small and Portable Each black light measures 3.7 inches x 1.13 inches and 1.8 oz. It's super lightweight and portable so you can put it in your pocket, at home or anywhere else. Small gift but very helpful, perfect for your friends, colleagues and pet lovers.Brighter Black Light 12 UV bulbs give out brighter light and last longer than other 9 UV bulbs. Flashlight uses 3 AAA batteries (not included)SATISFIED GUARANTEE You will get 2 black light flashlights (without battery)