Your Fast Tracker Metal Detector is a MOTION metal detector; movement over an object is required in order for the machine to detect an object and emit a tone.The Fast Tracker has eliminated the two most difficult aspects of detecting - ground balancing and target tuning. Both of these functions are automatic. With only two operating knobs, you are on the Fast Track to finding buried treasure! Bounty Hunter Fast Tracker Metal Detector is one of many Metal Detectors available through Office Depot. Made by Bounty Hunter.