To pair a device to your speaker, follow these steps:
On your device, turn Bluetooth on. This is typically found in your device's settings menu. Depending on your device, you may have to press "Search for devices" or similar to find available Bluetooth devices in the area
In your device's Bluetooth list, select the device named "Bose SLIII." If your device prompts you for a passcode, enter "0000" (four zeros). When pairing is complete and your device is connected to the speaker, the Bluetooth status indicator on the speaker changes from blinking blue to solid white and the speaker emits a tone
The speaker can remember up to six paired devices. If you pair the speaker with an additional device, the device least recently connected is no longer paired with the speaker.
To clear the speaker memory of all devices, press and hold Bluetooth (about 10 seconds) until you hear a tone. All devices are cleared and the speaker becomes discoverable.
When turned on, the speaker attempts to reconnect with a device in memory starting with the last connected device. If the last connected device is not available, the speaker connects to the next-to-last connected device, and so forth. The speaker searches for a paired device for approximately 30 seconds.