Used for registering the speed of almost anything that moves. Sports Radar's unique speed detection processor can take an accurate reading in less than 4 feet! This allows you to get that bat speed for baseball players, or club head speed for golfers. Reputation of being easy to use and reliable. Features include a 3 digit LCD display with 1 MPH or 1 Km/h resolution (user selectable display units) Tripod mount, Large display adapter, battery or AC adapter powered. Two modes of operation, the TRIGGER mode, takes a reading when the trigger is pulled, and the CONTINUOUS mode, always ready to take a reading. Great for single person use, put the SR3600 in continuous mode and you can throw, kick, pitch or hit into a net, and get every speed. The SR3600 has a RS232 communication Data Port allowing communication with your PC! ( Must purchase DB9/RJ45 adapter sold separately) Operates on 2 9v Batteries (Not Included)