MiiKey MiiSport C Black Wireless Bluetooth 4.0  Headphone with Microphone MiiSport C works from up to 33 feet away from your iPhone or any other Bluetooth device. MiiSport C can connect to two devices both at the same time giving you the ability to connect your tablet and phone without having to interchange pairing. Connectivity Technology: Wireless Built-in microphone, and a long-lasting battery The new MiiSport C wireless Bluetooth headphones are perfect for silencing your critics, wherever you are. They're wireless with rechargeable battery, microphone and re-engineered sound. The Bluetooth stays connected up to 30 feet so you can roam freely, keep the music going, take calls, skip songs, and change the volume right from the headphones. Hear what you want, when you want. Made for athletes Flexible wireless Bluetooth 4.0 headphones are designed to secure MiiSport C headphones on your ears no matter how rigorous your workout. Sweat-resistant materials and ear cups of all sizes keep you comfortable, always. User's guide. MADE FOR ATHLETES , Flexible wireless Bluetooth 4.0 headphones are designed to secure MiiSport C headphones on your ears no matter how rigorous your workout.