Enjoy the hands-free comfort of the M215 from Plantronics with call control for use with most mobile phones. The noise-canceling technology and flexible mouth piece provide superior call clarity. Experience the ease of the inline call control button and volume wheel that allow you to answer and hang up calls and control volume without touching your phone. So comfortable and lightweight you will forget you have it on! It also works with headset-ready cordless phones and telecoil-equipped hearing aids. Headset Adapters may be needed for Nokia and Ericsson phones.