Aircom AIRTUBE - A patented sound technology for true Live Sound Listening on Phones, Tablets and MP3 Players;S/M/L secure fit rings for a custom and comfort fit and it stays in ear;Magnetic end-caps on the earbuds to wear around the neck when not listening;Built-in Hands free Microphone with On/Off/play/stop switch;Radiation-Free Listening that keeps RF radiation away