The flexible ear-loop enables you to hear and be heard clearly wherever you are. The noise-cancelling microphone provides improved call clarity in most environments. The Plantronics M22 mobile headset provides stability, comfort and quality sound. It features a soft, flexible ear-loop that can be worn on the left or right ear to provide optimal fit and boom placement. The Siemens specific M22 -SM1 has also acoustic shock protection to protect the users hearing and is hearing aid compatible. Buy Plantronics M22 headset and free your hands today.