Jabra EarSet WindUP with 2.5mm Universal Headset Jack Sensitive, uni-directional microphone delivers consistent sound no matter how you move In-line WindUp with built-in clothes clips offers lightweight, tangle-free ease of use Retractable cord winds compactly to fit in the palm of your hand, a pocket, briefcase or purse EarGels channel sound into your ear for reception that outdoes your handset With the 2.5mm Universal Jack, this headset works with most phones (except Nokia phones)