Feature:1. PROFESSIONAL LIGHT SOURCE: UV black light flashlight uses 365nm SMD LED light source, not diode light, which is some professional use of the pen light.2. BLACK LIGHT: Black light flashlight has a black filtered optical lens that eliminates most of the external visible light (visible light you see when you shine it on a surface that is fluorescent).3. ALUMINUM: Blacklight flashlight has the latest plating technology of aluminum alloy deep reflector cup, so you get a tight, strong, far reaching light beam.4. DURABLE: Blacklight pen lights are impact resistant, scratch resistant, anti corrosion in harsh environments, and constant brightness.5. REVERSE POLARITY PROTECTION: UV pen lights have reverse polarity protection to prevent improper insertion of batteries into the flashlight.6. MULTI PURPOSE: Blacklight ultraviolet pen lights can be widely used for pet urine stain detection, money inspection, fluorescent agent detection, etc.Specification:Item Type: UV Black Light FlashlightMaterial: Aluminium AlloyProduct Size: Length Approx. 95mm/3.7in, Diameter Approx. 20mm/0.8inGross Weight: 37g/1.3ozPower Supply Battery: 1 x AA Battery (not Included)Light Source: UVWavelength: 365nmControl: ButtonLight Level: Normally BrightUse: Test Pet Urine Stains, Money, Fluorescent Agent Detection, Etc.Multi Purpose: Detect forged documents, currency verification, forensic science, gasoline inspection, amber and jewelry detection, body fluid detection and fluorescence, attracting specific species of fish or hunting scorpions and tracking other creatures. Widely used in industry and commerce, such as rock hunting and mineral detection, UV resin glue curing, pet urine stain detection, scorpion hunting, ID and passport inspection, fluorescent luminescence, automotive AC leak detection, jewelry and jade identification, crystal craft repair, etc..Package List:1 x UV Black Light FlashlightNote:All data are measured manually, and there are certain errors in the measurement results.