Aircom A3 Airtube Stereo Headphones with Hands Free Microphone, CLIC-IT Magnetic End-Cap, Secure Sports in-Ear Headphones - Active Black 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 Clic-it 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