ULTRAFIRE Black Light UV Flashlight, Super Power UV 395-405 nm LED WF-502B Blacklight Flashlights for Leak Detector, Pet Urine Stain, Bed Bug (Not Included Batteries)

UltraFire 502 UV Flashlight flashlight size:5.1 x1.1 x1.0 inch, IP65 water-resistant and dustproof protection class.

Power by 1*18650 3.7v rechargeable battery or 2*CR123 batteries (battery not included).

The battery needs to be purchased by yourself.

You can search for the battery model on Amazon to find the right battery.