Feature: 1. Feline ringworm inspection, it can detect feline ringworm through ultraviolet rays. By illuminating the skin, the place where the skin fluoresces is the ringworm of the cat. 2. Built‑in lithium battery, it can be quickly and directly charged via USB, with strong compatibility, fast charging, convenient, safe and practical. 3. Very small in size, it can be carried in a pocket, and it is waterproof at the same time, and it can also be used as an emergency power bank for mobile phones. 4. Multi‑gear design, it has five gears: strong light, medium light, low light, flash and SOS, which can be switched according to needs. 5. Multifunctional, it can not only check cat ringworm, but also check money and perform fluorescent agent detection. Specification: Item Type: Ultraviolet Flashlight Product Size: Approx. 125x25mm / 4.9x1.0in Weight: Approx. 151g / 5.3oz Battery: 1x1200mAh 18650 Lithium Battery (Battery Included) Material: Aluminum Alloy Gear Position: Strong Light, Low Light, Burst Flash Light Source: Purple Light Application Range: It is suitable for cat ringworm detection, pet excrement detection, currency detection and fluorescent agent detection. Charging Time: 4-5H Life Time: 5-6H Wavelength: UV-365nm Detection Distance: Within 1m / 3.3ft Service Life: 30000H. Package List: 1 x Flashlight1 x USB Cable