When you power on your Dolby Dimension for the first time, it will automatically be in pairing mode on the Source Button closest to the Power Button (Source Light for this Source Button blinks) and can be paired to your Bluetooth capable source device. To pair your Dolby Dimension to additional source devices, press and hold any Source Buttons for 3 seconds until the pairing tone is heard and correspond Source Light blinks to indicate pairing mode.  For further set up information, download and install the Dolby Dimension mobile application from your preferred app store.