SPK- SOUND FEAST 550 ZEBRONICS PORTABLE BLUETOOTH SPEAKER (USPK 104)

The modes available are BT v5.3 | USB | AUX.

To connect USB and AUX, you can directly connect AUX cable backside of the speaker and use it (if needed you need to change it to AUX mode by pressing “M”).

For USB you need to use Max 32GB pen-drive and the pen-drive need to be FAT 32 format you can directly connect the Pen-drive backside of the port (if needed you need to change it USB mode after connecting the USB by pressing “M”).

Yes you can connect 6.3mm MIC backside of the speaker.

To adjust MIC echo control double, click MENU button, to increase and decrease you need to press volume button and same goes for Mic volume.

To use TWS mode long press Play/pause button. (To use TWS mode you need to use the same speaker no other model will connect.)

To reset the device you need to long press Bass button.