When a big buck steps into the clearing you have been scouting for months; do not rely on a guesstimate. The Raider 600 will put you right on the money. Lightweight and compact; it uses a precision laser for fast; accurate ranges to your trophy. Press and release the button for a single reading in yards; or press and hold the button for continuous distance updates. 3.7 inches in length; weighing 5 ounces; the efficient design keeps bulk to a bare minimum. CR-2 battery for maximum battery life.