Specification:Product name: Nitecore Tube UV 500mW 365nm USB LED KeychianMax Run time: 1 h 0 m \/ 0.04 dLED: UltravioletBattery: Rechargeable Li-ionSize: 2.22” x 0.83” x 0.31” (56.5mm x 21mm x 8mm)Weight: 0.34oz (9.6 gram)(with battery)Color: blackFeatures ·Featherweight and handy design·Good for money、 identity cards detection、 verification mark reading and fluorescence activation·Featuring 500mW power、 365nm wavelength ultraviolet LED·Integrated intelligent Li-ion battery charging circuit (micro-USB charging port)·Built-in rechargeable Li-ion battery provides a runtime of up to 1 hour·Single switch offers easy one-handed control·Constructed from durable Polycarbonate materials·Dual metal key ring connector withstands up to 77lbs (35 kg)·Impact resistant to 1.5 metersPackage included:1 x Nitecore Tube UV 500mW 365nm USB LED KeychianEnglish Manual