Check the listing for details. Detector Pro Gray Ghost Original with Equinox 1/8" Waterproof Plug. Color: Gray, Condition: New. Listed at 114.95 USD. Detector Pro Gray Ghost Original with Equinox 1/8" Waterproof Plug Now for the first time there is a serious alternative to the many headphones available in the past for metal detecting. Our new Gray Ghost Headphones have been custom designed specifically for metal detector users. Start hearing those "ghost signals" others are missing. Our headphones are engineered rugged, tough, and made to stand up to outdoor use. Gone are the days of wimpy phones that break on the littlest twig, gone are the days when outdoor noise kept you from hearing the deepest targets. Gone are the days when headphones wouldn't stay on your head, gone are the days of discomfort and loss of concentration. Gone are the days of frustrating two-knob volume adjustments, and with our special sound limiting circuitry, gone are the days of headaches from too loud hits.SpecificationsImproved high-end, crystal clear speakersSelector switch for metal detector compatibility with all single-output metal detectors without adaptersHeavy-duty muff-to-muff connection cableHeavy-duty coil cable with special 1/8" waterproof stereo connectorCompact carry and storage foldable designHeavy-duty polymer muffs with full-ear surround, soft comfortable cushionsAdjustable padded headband, no screws, no wire frame, no rust!Speakers designed for maximum sensitivity, efficiency, durability, and signal qualitySpecial built-in signal limiting circuitry to protect hearing from high volume hits, no batteries!Special sound-blocking muff design eliminating environmental ambient noise up to 24 decibelsFrequency response: 200 - 3200 Hz. only what your detector usesSensitivity: 72 dB @ 1kHz minImpedance: 150 ohms nominalBacked by a limited lifetime warranty