Features User-selectable impedance for compatibility with all water detectors Heavy-duty muff-to-muff connection cable Heavy-duty coil cable with underwater bulkhead connector Compact carry and storage foldable design Heavy-duty polymer muffs with full-ear surround, soft comfortable cushions Adjustable padded headband Solid state speakers designed for maximum sensitivity, efficiency, durability, and signal quality wet or dry and regardless of depth Special sound-blocking muff design eliminating environmental ambient noise up to 24 decibels Frequency response: 200 - 3200 Hz Backed by a limited lifetime manufacturer warranty