Features & Specs: Output: 100 Wavelength: 532nm Color: Green Switch: Momentary Side Button Material: Brass Power Source: 2xAAA (Case Positive) 1x Tinker Tavern case included. This is a pen-style laser intended for light-duty applications such as star pointing. The Classic model is also suitable for presentations or use with pets. 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.