Advanced Technology: Bluetooth 4.1 makes it convenient to connect smart phones and also provides steady Bluetooth signal to support connecting devices over 50 feet away; CVC 6.0 Noise Cancellation technology guarantees high-quality speech output. Simple-to-use: You can skip tracks, control volume and take calls with a quick tap. It is also equipped with voice prompt, making it easy for you to operate. Comfortable Wearing: The Ergonomic design creates ultimate comfort and fit, included S/M/L ear tips achieve better stability and comfort to wear it while playing sports.