The Gray Ghost headphones were designed for the demanding professional electronic prospector and gold nugget hunter. Compact carry and storage foldable design. Heavy-duty polymer muffs with full-ear surround, stay-soft, non-hardening cushions. Adjustable padded headband... no screws, no wire frame, no rust! Speakers designed for maximum sensitivity, efficiency, durability, and signal quality. Special sound-blocking muff design eliminating environmental ambient noise up to 24 decibels. Also has a built-in large signal blocker to limit the volume of the response to a large target.
Frequency response: 200 - 3200 Hz (only what your detector uses)
Sensitivity: 72 dB @ 1kHz min.
Impedance: 150 ohms nominal.
Backed by a limited lifetime warranty from manufacturer.