Akai ASB220I Manual page 16

 Press the SOURCE (5) button or the SOUND EFFECT (6) button to
select the desired file.
 To start playback, press the PLAY/ PAUSE/ PAIR button (1) once.
Operation with BLUETOOTH
You can wirelessly connect the ASB220I to devices that have Bluetooth
A2DP.
We can not guarantee that all Bluetooth devices are compatible.
Preparation
 Turn on the Bluetooth function of your device
Establishing a Bluetooth connection (PAIREN)
 Press the SOURCE button (5).
 Select the desired source (BLUT).
 Press and hold the PLAY/ PAUSE/ PAIR button (1).