Does anybody know what's the problem with this earphone? so weird!

 

Hello there
this is from your owner's manual I hope it helps.
How to reset Redmi AirDots.
Step 1press the multi-function key for 15 seconds until the red and white light flashes alternately three times on and off, the device reset successful.
Step 2: Ignore or unpair "Redmi AirDots_R", in the list of Bluetooth devices for mobile phones. Delete the connection record and complete the reset