The buzzer has two modes of operation:
To turn off the buzzer: Press and hold the release button for more than 2 seconds, the JHE20B Finder turns off the sound.
The JHE20B Finder is compatible with all BF and CF flight controls. Just connect to the buzzer interface of the flight controller and it will work. When the flight control wiring is correct, the multi-rotor aircraft is powered on, and the flight control power supply will be automatically charged for the JHE20B Finder (the red LED will light to indicate charging is in progress, the red light is off to indicate charging saturation; the red light flashing indicates flight control) Electricity, enter 30 seconds waiting time).
JHEMCU JHE20B Finder 100dB Buzzer with LED. Supports Betaflight