BOSS TONE STUDIO dedicated for KATANA-AIR/KATANA-AIR EX ●Connect the BOSS KATANA-AIR series and your Android mobile devices via Bluetooth to use this app. * BOSS KATANA-AIR/KATANA-AIR EX is necessary to use this app. * Set up the Bluetooth connection in the Connection window displayed after the app is launched. * When using on Android 6.0 or later, please turn Android Location mode on. ● BOSS TONE STUDIO (BTS) incorporates convenient functions; ‘Download Function of Additional Tones (Livesets)