[365nm UV Torch] - Objects fluoresce most strongly under 365 nm UV light. 365nm UV light can make invisible substances clearer than 395nm UV light. Ideal for detecting pet urine or invisible stains on the floor or carpets.[Note]: Do Not Look Directly into UV Light. [Battery Powered UV Torch] - The 365nm ultraviolet flashlight runs on 2 AAA batteries (The batteries are not included). [Battery Usage Note]: Ensure to insert the batteries in the right direction as shown in the image. [High UV Purity] - The Small UV light torch is equipped with a UV filter to maximize the purity of UV light by filtering visible light interference. The purer UV light makes invisible substances fluoresce brighter while minimizing interfering violet light on objects. [Compact and Lightweight] - The UV pen torch is pocket-sized at 1.5cm wide and 13.2cm long, and weighs as light as 28g (approximately 50g with batteries included). [Easy to Carry with a Clip] - The black light torch comes with a clip, ideal for attaching it to your pocket, belt, or bag for convenient carrying wherever you go. The clip is detachable, so you can take it off as needed.