254nm Violet Light: Belongs to the short wave violet light range, can be used for viewing ink marks, detecting fluorescent agents, non-destructive testing, anti-counterfeiting verification, and other applications. Versatile Application: This flashlight can be used to detect the authenticity of various items including ceramics, jade, and artworks, allowing you to check for repairs, glue, or other alterations, authentication tasks such as detection, mineral inspection, and evaluating currency, stamps, and wine labels. Long Battery Life: Powered by a 2000mAh Li battery (built in), this flashlight offers an impressive runtime of up to 3.5 hours, ensuring you have when you need it. 365nm 395nm Violet Light: Ideal for identifying fluorescent materials, activates fluorescence in minerals, making it easier to assess their authenticity and quality. Material, Portable: Constructed from sturdy aluminum alloy, this flashlight is both and resilient, making it easy to carry while ensuring for long term use.