Features Single rotary volume control with "stay put" segmented "click" positioning Push-button selector switch for metal detector compatibility without adapters Push-button switch activates limiter Special low-noise signal limiting circuitry protects your hearing from high volume hits without batteries Heavy-duty muff-to-muff connection cable Heavy-duty coiled cord with a special three conductor 1/4-in, 90-degree angle stereo connector Industrial grade Nylon 6/6 pigtail strain relief on cord termination Compact carry and storage foldable design Heavy-duty polymer muffs with full-ear surround, soft comfortable cushions Adjustable padded headband Speaker elements are the ultimate in sensitivity, efficiency, durability, and signal quality Special sound-blocking muff design eliminating environmental ambient noise up to 24 decibels Backed by a limited lifetime manufacturer warranty