Clear， rich stereo music streamed wirelessly. Ideal for an active lifestyle， Mpow Cheetah Sport Bluetooth headphone allows you to both wirelessly enjoy music and take call during workout.Bluetooth 4.0 with aptX codec for high-fidelity stereo music and clear speech， You can begin enjoying CD quality stereo sound instantly.Comfortably fits either ear.This headset is designed to lock in so you can focus on your workout. A behind-the-ear shape design means whatever the intensity of your workout you will get the perfect fit. It will stay firmly and comfortably in place.Exercise is about breaking free so don't let wires hold you back. Skip tracks， control volume， take calls with a quick tap of your headset.Light (24g)， compact (hold in your palm)， comfortable， secure and easy to carry.