The MOMENTUM Free is the most compact model of Sennheiser's premium MOMENTUM family and the most compact Bluetooth headphones Sennheiser has ever built. Featuring cutting-edge wireless technology like Bluetooth 4.2 and Qualcomm aptX, it delivers immaculate hi-fi sound. With its integrated microphone and a three-button remote, the MOMENTUM Free is also a fully equipped headset – the perfect device for a mobile lifestyle.