• Built, field tested and approved for land use with all types of metal detectors 
• Efficient, wide dynamic audio range speakers enhance weak signals - FIND MORE TREASURE! 
• Dual volume controls for adjusting signal levels to suit individual hearing requirements. 
• Comfortable leather headband and ear cushions for maximum comfort. 
• Reinforced 10-foot coiled cord  
• Speaker impedance: 8 ohms per channel. Mono/Stereo. 
• Frequency response: 30-18,000 Hz.