The Bang & Olufsen Cisco 980 comes with a 3.5 mm cable for a simplified audio experience.
You can't control calls or music playback when you use the 3.5 mm cable. Any connected Bluetooth® sources will have priority over the 3.5 mm audio connection.
Plug the 3.5 mm audio cable into the port at the bottom of the right ear cup.
Insert the other end of the cable into the 3.5 mm jack on your device.