To enable Bluetooth pairing, hold the power button at the top of the unit for 5 seconds. The red LED will start flashing and a beeping sound is heard in the speaker, indicating the unit is in pairing mode.
Go to the Bluetooth settings on your phone or tablet to find and pair the unit. Subsequent Bluetooth connections from the same unit do not require pairing.
Pairing can also be enabled from inside the EC PLAY app under More "..." -> Bluetooth.