1. The speaker is on, searching available device “Fosi Audio B2” to pair. The indicator is on when the speaker is paired successfully. The indicator is flashing while music is playing. The speaker will automatically connect back to the device within 30 seconds of turing it on again if the speaker was paired. 
2. Long press the “▷” button for 2 seconds to disconnect the Bluetooth device. The speaker will power off after 10 minutes automatically without Bluetooth connection. 
3. Long press the “⟁” button for 5 seconds to clean the Bluetooth paired devices list of speakers. 

      For IOS system, you can synchronize the volume up or down on the mobile phone.   

      – Volume down/ Previous song 

      + Volume up/ Next song

      ▷ Play/ Stop

 Under True wireless stereo pairing mode, the main speaker will answer the incoming call. 

True wireless stereo mode

1. Turn on two B2 speakers, don’t connect them with your phone first. Long press the “⟁” button of either speaker for 2 seconds, the prompt tone sounds, both speakers will be connected together automatically. Then turn on the Bluetooth of your phone to search available device B2 to pair. Once successfully, the blue indication keeps flashing which is main speaker. The blue indicator keep on which is hub speaker. 
2. Under stereo pairing mode, the indicators of both speakers keep on. Then, the indicators turn into flashing while playing music. 
3. Long-press “⟁” button of either speaker for 2 seconds to end the stereo pairing mode. But the Bluetooth connection won’t be disconnected with the main speaker. 

Please fully charge the speaker for the first time uses, the full charging time is about 3-3.5 hours. When charging, the indicator is keeping red, the red light goes out after charging finished. (Note: If the product is not used for a long time, please fully charge the product at least once a month to avoid excessive discharge, which will affect the service life of the battery). 

Low power warning

When the power of the speaker is lower than 20%, you will hear the prompt sound of low power. Please charge the speaker with the included type c charging cable DC5V/2A in time. When the power of the speaker is lower than 5%, the speaker will be shut down automatically.