ULTRAFIRE Black Light UV Flashlight, Super Power UV 395-405 nm LED WF-502B Blacklight Flashlight Requires Batteries (Batteries are NOT Included) Battery Size 1*18650 3.7v rechargeable battery or 2*CR123 batteries About this item Extreme Power UV Blacklight Flashlight: Professional grade UV flashlight black light, used the newest model UV LED Chip, 395-405 nm, UltraFire UV black light is 30% Brighter than other lights, helps you to find urine stains EVEN in indoor or streetlight, best choice for pet dog cat urine detection. Zoom In and Zoom Out: With Focus Adjustable Zoomable Function that you can see your entire yard. Enjoy the fun of watching small animals at night. Long Running Time: UltraFire UV Flashlight is Premium Aluminum Construction with anti abrasive surface treatment, non-slip textured grip, clip. IP65 water-resistant dustproof protection class. Power by 1*18650 3.7v rechargeable battery or 2*CR123 batteries(Batteries not included).The battery needs to be purchased by yourself. You can search for the battery model on Amazon to find the right battery. Save Your Money and Time: This uv blacklight flashlight could work as portable pet dog cat urine detector light, flashlight blacklight finder ,Contamination and leaks detector, Authenticate currency, driver license, official identification cards, passports. Essential tool for medical forensics, HVAC repair and so on. Help you to save thousands of dollars, efforts and time.