The HamiltonBuhl SOP-SC-7V Sack-O-Phones- 5 Pack of Hamilton SC-7V Deluxe Headphones with Leatherette Ear Cushions and Volume Control. 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) SC-7V Deluxe Headphones with Leatherette Ear Cushions and Volume (1) Sack-O-Phone Carry Bag Compatible With: MP3 Players Cell Phones / Mobile Devices Tablets / eReaders Chromebooks Computers (Mac & PC) CD Players / Stereos TVs Most Gaming Systems