You can have up to two devices connected to your headphones at the same time. However, you can only play audio from one device at a time. These Bluetooth connections are controlled with the Power/Bluetooth switch. Voice prompts guide you through controlling multiple connections. Once two devices are connected:
Pause audio on your first Bluetooth device
Play audio on your second Bluetooth device
Note: Your headphones receive phone calls from both devices, no matter which device is playing audio.
You can also manage multiple connected devices easily using the Bose Connect app.