JBL Portable 4.1.199 (Android 5.0+) APK Download by Harman Consumer, Inc. - APKMirror
How to connect JBL speakers together
GitHub - pembem22/connect-plus: An Android app to connect and configure JBL Bluetooth speakers with additional functionality like flashing custom firmware and stereo audio playback with different speaker models.
Pro Connect v11 (Android) | JBL Professional Loudspeakers