Turn off your phone's Bluetooth, turn it back on, and restart the speaker. Poor FM Radio reception
Insert a MicroSD card loaded with MP3 audio files into the card slot on the back. The speaker will automatically switch to TF card mode and start playing. yayusi s2 user manual
Open the Bluetooth settings on your smartphone, tablet, or computer. Search for available devices and select . Turn off your phone's Bluetooth, turn it back