On button to the lock: Toggle the on/off button down to the lock mark 
to enable the button lock. When it is locked, the motor cannot start working if pressing the on/off button.
Toggle the on/off button to the unlock “
”mark to unlock the button. Toggle the on/off button to start the motor and release the on/off button to stop work.
to enable the button lock. When it is locked, the motor cannot start working if pressing the on/off button. Toggle the on/off button to the unlock “
”mark to unlock the button. Toggle the on/off button to start the motor and release the on/off button to stop work.