Ultraviolet rays Ultraviolet wavelength of 365 nanometers (nanometers). This is truly a dedicated detection spectrum. It can be used in natural light and performs better in the dark with almost no visible light leakage. 365nm ultraviolet light is invisible to the naked eye. Therefore, it is not as bright as a 395nm flashlight, but it is more suitable for detecting high requirements such as fluorescent agents and anti-counterfeiting codes. Reminder : Please clarify your requirements before placing an order. [Compact and Durable Design Lamp The 365nm portable black light UV lamp is made of an aircraft aluminum body that is double anodized for heat resistance. corrosion, with a weatherproof silicone gasket. This is a small, lightweight black light that can be easily put in pockets, backpacks, toolboxes and cars to save space. Name: Dual light source flashlight beads: XML-T6 Lamp Beads and UV Band: 395nm Lens: Convex optical lens Battery: 1 x 18650 battery Voltage: 3.7V Focus: Telescopic Focus Material: Aluminum Alloy Weight: 130g Dimensions: head 39mm tail 28mm height 134mm Features: 1. Double light source lamp beads: XML-T6 and UV lamp beads, white light is suitable for camping, hiking, cycling, exploring, etc., purple light detects pet urine, stains, scorpions, insects, etc. daily necessities, etc. 2.The flashlight has a zoomable design, can adjust the field of view, and is easy to operate 3. Lotus Head Head: both beautiful and can be used as an emergency defense in the field