If you can find the bluetooth but can't connect, you can try to solve it through the bluetooth reset function.
(1) Press the power button to start the label maker;
(2) Open the paper bin cover of the label maker;
(3) Press the power button 3 times in a row;
(4) After about 2s, the label maker beeps 4 times, "Didi Didi", which means the reset is successful;
(5) Open the App tests whether the connection to the printer is successful.