Sport Audio Sennheiser HD 250 Bluetooth Headphones Black Sennheiser's HD 250BT provides an exciting audio experience with dynamic bass, state-of-the-art Bluetooth 5.0 connectivity, and a durable design. Thanks to a 25-hour battery life and advanced codec support, Sennheiser's high-quality audio experience can be enjoyed anytime, anywhere. Sennheiser's renowned driver technology, as well as its support for high-quality codecs such as aptX and AAC, ensure outstanding audio quality with dynamic bass. No matter if you listen to music, watch videos or make calls with the built-in microphone, the HD 250BT can keep up with the busiest of lifestyles thanks to its outstanding 25 hours of battery life. Just Sanborns.