DetectorPro Black Widow ™  Headphone

• Impedance - 150 ohms nominal
• Compact carry and storage foldable design.
• Backed by a limited lifetime warranty
• Heavy-duty muff-to-muff connection cable
• Adjustable padded headband
• Sensitivity - 72 db @ 1 KHz Min
• Frequency response: 200 - 3200 Hz... only what your detector uses