KTN-GO and KTN-GO2
There are two different external designs for the KATANA:GO corresponding to the period in which they are sold. This manual only features illustrations for one of these designs, but there is no difference in functionality or sound quality between the two. For details, see “About the external design of the KATANA:GO” (BOSS website).
https://roland.cm/katana-go_om
https://roland.cm/katana-go_om
If "KATANA:GO AUDIO" does not appear on the Bluetooth settings screen, check the remaining battery level of your mobile device. If the battery is low and power-saving mode is activated, the Bluetooth function may be disabled.
See also: KATANA:GO: How do I perform the guitar along with songs playing on my mobile device?