Reveal hidden stains, fluorescent materials, and more with the 395nm UV light. Ideal for pet stain detection, document verification, and various applications. Compact and portable design makes these mini UV keychain flashlights easy to carry. Attach to keys, zippers, or backpacks for convenient access. Simple slide switch operation provides instant UV illumination with no complicated steps. Powered by CR1220 batteries (included), each flashlight offers up to 18 hours of continuous use. Great for enhancing nighttime activities, creating fun atmospheres, or supporting outdoor adventures. Suitable for night events, holidays, camping, and emergency situations. Set includes 48 mini UV keychain flashlights in purple color. Made of plastic material. Package contents: 48 x mini UV keychain flashlights. Note: Slight color variations due to lighting and display differences may occur. This does not affect product functionality. Measurement error allowed within +/- 1-3 cm.