HamiltonBuhl Sack-O-Phones, 5 HA-66M Deluxe Multimedia Headphones in a Carry Bag It"s a great way to store headphones easily and economically. No need for costly plastic cases for storage. Carry Bag - 18 x 14 in. Frequency Response - 20-20&#47;000 Hz Impedance - 32 Ohms &#43;- 15&#37; each side (5) HA66M Deluxe Multimedia Headphones with Microphone (1) Sack-O-Phones Carry Bag