Axxera iPlug S is an app designed to control certain Axxera brand radios. It can select from 4 different sources; Radio mode, USB mode, Bluetooth music mode and AUX mode via Bluetooth control. - Radio mode on the APP allows you to scan and store radio stations or select your favorite radio station via the radio presets. - USB mode can playback music stored on a USB flash drive and display ID3 information if available. - AUX mode will play audio from an external device via 3.5mm headphone jack. - BT music mode will stream music from the connected device and display ID3 information if available, it will also have basic controls such as play/pause/previous/next. The app also features audio control such as treble/bass/volume level control of the connected radio.