- HA2M Sack-O-Phones
- 3.5 mm jack
The Hamilton Buhl SOP-HA1A Sack-O-Phones - the pack of Hamilton HA1A personal headphones with wire headband. 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.