Your Logitech UE Boombox can store up to eight paired devices in its memory. After the first device is paired (see answer 360023249054 for help), you can pair additional devices. Here's how:
Turn the speaker on by sliding the power switch on the left upward.
Hold down the Bluetooth button (above the On switch) on the left side of your Boombox until you hear a tone.
NOTE: The LED surrounding the Bluetooth button on your speaker will blink blue quickly indicating the speaker is ready for pairing.
On your device, go to the Bluetooth menu, and scan for devices.
Select UE Boombox from the list of devices.
Once paired and connected, you'll hear an audible confirmation from the speaker. Your UE Boombox is now ready to use with the device you added.
NOTE: While your speaker can store up to eight paired devices, it can only maintain an active connection with three of them at a time. See answer 360023249054 for more information.