This Blackberry hands-free headset has the same fantastic audio characteristics of our other Blackberry headsets, but the flexible rubber ear loop is what sets this headset apart from the others. The ear loop can be worn on either ear. Once placed around the back of your ear, it doesn't shift and remains in place. Pulling at the wire will not shake the position of the ear piece. Other models of Nextel hands free head sets typically shift position when tension is applied to the wire, causing you to readjust the ear phone's position. Sometimes the headset will fall out of your ear altogether. This is really a "set it and forget it" design.