Wirelessly stream high-quality music with the Sennheiser CX 7.00BT thanks to aptX technology. Easily connect the headphones to your smartphone with Bluetooth. This way, there won't be any cables in the way, and you'll have all the mobility you need. There will only be a thin cable around your neck. You can listen to your favorite music for up to 10 hours. The earbuds produce powerful and deep bass tones. The neckband has buttons to control your music and receive phone calls. Had enough of listening? Use the storage pouch to safely store your headphones.