Features & Specs: Output: 100 Wavelength: 495nm Color: Aqua Green / Cyan Adjustability: Focusable / Threaded Lens Switch: On-Off Material: 304 Stainless Steel, Polished Power Source: 2x16340 3.7V (Case Positive)   Glow Vials 🧪 (Optional): Glow Vials are inserted into the cutouts near the top of the Steel body of the Valkyrie laser and can be charged with UV or visible light (such as a Flashlight).   Designed by Tinker in United States. Engineered in Greece. "Valkyrie" product photographs are captured on Canon EOS R7 at 32.5 MP. Color accuracy achieved using unedited sensor data for 97% of available "Valkyrie" photographs. Some photographs may be taken using a UV Lens Filter. Varied lenses. Full camera settings may also be included here at a later date, for some specific product photographs. Please read each section below carefully if you intend to purchase this item. This is not a toy, and should be treated with extreme caution and care. DO NOT POINT AT, AROUND, OR NEAR EYES. MAY CAUSE SEVERE EYE DAMAGE IF MISUSED. Warnings Battery & Charging Safety Refund Policy Use common sense when handling this item, and any other items that are available on our website or other platforms, distributed by our brands. Disclaimer: This laser is intended for use by licensed professionals, Researchers, and other experts. We do not take responsibility for misuse of this item.