Bounty Hunter Tracker IV Metal Detector w/ 8in Coin Depth Detection - TK4. 25-inch Headphone Jack Target Strength Meter Display Motion Discrimination System Automatic Ground Balance Sensitivity Adjustment Low Battery Indicator Internal Speaker Operating Frequency 6.5 kHz Package Contents: Bounty Hunter Tracker IV Metal Detector with 3 Operating Modes Bounty Hunter Metal Detectors are made by First Texas Products a manufacturer with over 30 years of top quality metal detectors and metal detector accessories. Be sure to check out the full line of Bounty Hunter products including Bounty Hunter Metal Detectors and Bounty Hunter Metal Detector Accessories. Bounty Hunter Tracker IV Metal Detector w/ 8in Coin Depth Detection - TK4