The iPhone's great success has meant that earphone manufacturers haven't been reluctant to create earphones especially for it, including the mic/clicker arrangement used for calls and to control playback. There are relatively few that have volume controls on the same clicker; but the Image S4i earbuds from Klipsch do. While volume controls are a nice convenience for, say, iPhone users, they're vital for anyone who wants to add better third-party earbuds to a new iPod shuffle, as is the Image S4i's support for VoiceOver.



Link: TechRadar