The Hamilton Buhl SOP-HA66M Sack-O-Phones– 5 Pack of Hamilton HA66M Deluxe MultiMedia Headphones with Microphone. Sack-O-Phones packaging is a unique bag that doubles as a knap sack and holds 5 deluxe or 10 personal headphones. It’s a great way to store headphones easily and economically no need for costly plastic cases for storage.

Sack-O-Phones Includes:

• (5) HA66M Deluxe MultiMedia Headphones with Microphone
• (1) Sack-O-Phone Carry Bag

Carry Case Specifications:

• Carry Bag
• 18″ x 14″
• Draw string Non-Woven Polypropylene Material

Carry Case Specifications:Carry Bag18″ x 14″Draw string Non-Woven Polypropylene Material

Headphone Specifications:

• Headphone:
  • Speaker Drivers: 40mm Mylar Magnet Ferrite Cobalt
  • Frequency Response: 20-20 000 Hz
  • Impedance: 32 Ohms +- 15% each side
  • Sensitivity: 110dB
  • Max. Input: 30 mw
  • Plugs: 1 /8†Stereo black jacketed nickel plated
  • Cord: 7 feet
  • Headband: Adjustable Vinyl Covered
  • Black vinyl
• Microphone:
  • Electret condenser Omni Directional
  • Sensitivity: -41dB standard -38dB max -35dB
  • Frequency Response: 20-16 000Hz
  • Impedance: 1 500 Ohms
  • Operating Voltage Nominal 3V: Accepts 1.5V-10V “
  • Plug: 1/8″ Nickel Plated Stereo Red Jacketed

Optional Accessories (not included): <