The Teknetics (R) Gamma 6000 Metal Detector features many levels of discrimination adjustability so you can narrow your target search. Discrimination, pinpoint, all-metals, and ground grab modes allow maximum searching flexibility, and the 2-digit numerical target identification makes it easy to see what you've found. The Gamma 6000 features manual ground balance that filters out minerals and targets metal only. FEATURES: Menu system 79 levels of discrimination to narrow target search Discrimination, pinpoint, all-metals and grab modes for maximum searching flexibility 2-digit numerical target identification Four-tone selection and audio is proportional to signal strength Mineralization readout Manual ground balance filters out minerals and targets metal only Specs: Transmission Frequency: 7.8 kHz Battery: 1 x 9V Weight: 2.3 lbs. Extended Length: 51" Collapsed Length: 41"