Made to US Government specifications, this light is an exact copy of the famous Military Angle Head Flashlight. Just like the original it includes four extra colored lenses (red, yellow, green, and blue) and an extra bulb. Uses 2 standard D-Cell batteries (not included). Rubber O-rings keep this light working in the most inclement weather. Includes a clip on the back side to attach to a belt, shoulder strap or pocket.