1Black Mirror Filter: UV flashlights use high quality light source, with UV black mirror filter, the purple light is more pure. 2Pen Clip Design: One touch switch in the middle, pen clip design, light and portable, you can put it in your bag and use it at any time. 3Fin Shape: The head has a fin shape heat dissipation rings, which can effectively dissipate heat, prevent overheating, and prolong the service life of the lamp beads. 4Aluminum Alloy Material: USB low voltage charging, safe and stable, made of aluminum alloy material, durable, can be used for a long time. 5Wide Range of Uses: Purple light is suitable for pet cat moss detection, banknote identification, play treasure identification, cosmetics detection, etc. Item Type:UVFlashlights Material: Aluminum Alloy Weight: Approx. 197g / 6.9oz Size: Approx. 130 x 41 x 31mm / 5.1 x 1.6 x 1.2in Power Supply Battery: One 26650 Lithium Battery (Battery Not Included) Light Source: Purple Light Charging Method: USB Life: 40000H 1 x UVFlashlights (Battery Not Included) 1 x USBLine