Seems like a bad move. Immensely frustrating. Nux Mighty Plug - plug in, switch on, play songs on phone and play along to them. Katana Go - plug in, switch on, try to pair Bluetooth via the app, apparently it works, try playing music on phone with the same player app as I use with the Nux, music comes through phone speakers. Adding songs one by one to the session list in the BTS app, try playing them after going through the Bluetooth connection rigmarole on the app and the device, and they play through the phone speakers. Unusable. Not surprised it's been discontinued, should never have been sold in the first place. The Nux Mighty Plug might have inferior sound quality but it's infinitely superior in usability.