The Bushnell Velocity Speed Gun will determine the speed of your shot and help you monitor your progress as you work on improving it. The easy-to-use speed gun is a point-and-shoot pistol with a grip handle to aid in the most accurate reading. Displayed on a large and clear LCD display, the reading is precise and accurate to the nearest mile. The readings can range from 10-200 in both MPH and KM/H. The speed gun can be used from up to 90 feet away and still deliver precise readings. The Bushnell Velocity Speed Gun has a quick and easy set up and operates off of 2 C batteries.