Levin Stereo Bluetooth Sports Headset Apt-X technology Wireless Sports Neckband Earphone for Smartphones and Bluetooth Devices (Black) BUILT-IN MICROPHONE : LEVIN Sports headset with built-in microphone for phone calls when you are doing excises or outdoor activities POWERFUL BASS SOUND : Full range audio spectrum for deep bass ,all the way to crystal clear high frequencies of music or phone calls HANDS-FREE DESIGN:With levin headset, you are totally hands free when doing exercise without wires ,Your ultimate comfortable choice for wireless music and call when training LOCKS IN - WON'T FALL OUT: Levin headset is designed under Ergonomics to lock around you ear ,so you can focus on running FOLDABLE and FLEXIBLE: The Flow headset folds up for easy transport and storage anywhere you want by special material