Sennheiser Wireless

Bluetooth 4.0 and aptx technologies to deliver exceptional wireless sound quality intuitive ear cup mounted controls for changing tracks and for making calls via the integrated microphone up to 25 hour battery life and is supplied with connecting cable for battery free listening compatible with most smartphones & tablets. height: 7.8 inch / 19.8 centimeter product dimensions: 7.1 x 3.9 x 10.2 inches. connectivity technology: wireless; battery type: li ion polymer battery