【Ultra Compact】 UV flashlight at 5.7 inches in length is designed as EDC black light to fit in anyone's pocket, shirt, and pants or attach it to a keychain, lightweight and easy to carry around. 【Easy carrying】portable penlight with pocket clip makes you can easily carry it. Small light with clip hook is easy for daily carrying with bag. 【Simple On/Off Switch & cool looking】Mini led flashlight comes with pocket clip and rotary switch button for effortless one-handed operation. 【395nm Black Light】 UV flashlight utilizes a 395nm LED, Specially designed as a professional detector flashlight , also great for pets Urine, Fluorescent detection or other daily use. Power By 2 AAA Alkaline Batteries(Not included),You can easy to purchase the battery in the store. The ultraviolet led black light works perfect in dark environment, the darker it is, the better it works.