Garrett Ms-2 Headphones Garrett MS-2 Headphones with 1/4-inch right angle stereo phone plug for use with ACE detectors (Requires 1/4" Headphone Adaptor to work with AT-Pro International, AT Gold, AT Max International, Infinium LS, Sea Hunter MkII and ATX) Volume control. Adjust signal levels to suit individual hearing requirements and to enhance weak signals. Comfortable headband and ear cushions. Reinforced 10-foot coiled cord with right angle. Speaker impedance: 8 ohms Frequency response: 30-18,000 Hz.