These headphones have been tested and still work great.
Technical Specifications:
- Single rotary volume control with “stay put” segmented “click” positioning.
- Selector switch for metal detector compatibility with all single-output metal detectors without adapters.
- Heavy-duty muff-to-muff connection cable.
- Heavy-duty 48″ coil cable with special 1/4″, 90 degree angle stereo connector.
- Compact carry and storage foldable design.
- Heavy-duty polymer muffs with full-ear surround, soft comfortable 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.
- Impedance: 150 ohms nominal.