This Japanese-made LED UV light features an original LED board designed and manufactured in-house. It features five UV LEDs. Model: UV-LED375-05SB. It uses Nichia UV LEDs with a 375nm UV wavelength. It also includes three AAA batteries. Dimensions: 100mm long, 38mm diameter. The circuit board, the most important element of a UV LED light, is designed in-house. Everything from design to manufacturing and assembly is done in Japan. Each component is hand-soldered by skilled craftsmen to prevent poor contact due to cracks. The UV LEDs are genuine Nichia products. A "GENUINE NICHIA LED" sticker is included to confirm authenticity. Compatible with a variety of batteries. Using three AAA batteries allows for long-lasting UV exposure. It can be used with alkaline batteries, manganese batteries, Eneloop batteries, and rechargeable batteries, as well as Oxyride batteries. This product emits powerful UV light. Do not look directly at the light source as it may damage your eyes!