The Urine Off LED Mini Urine Finder (UV Blacklight) is designed to make invisible urine deposits easy to find. Rugged and reliable, its focused beam reaches 5 - 6 feet, so no more getting on your knees to search for urine! The Urine Off Urine Finder is impact and water resistant and uses low power for long battery life. Requires 3 AAA Batteries (not included).