This Plantronics 2.5mm Quick Disconnect (QD) is a 10ft coil cable that allows any H series QD headset to be used with cordless or cell phones that have a 2.5mm jack.

Part number: 70765-01 For use with Plantronics H series quick disconnect (QD) headsets Connects headset to devices with a 2.5mm headset jack 10ft (3.05m) coil cable Three conductor Recommended for common usage