1. It is compatible with the functions of the traditional active  

buzzer and synchronized with the flight control.

    2. When the flight control is normally connected, if the main  

battery in the flight is powered off, it can still automatically  

emit 110 dB of drip sound after 30 seconds of power failure, and the  

LED will emit white light, and the sound is louder than the general  

buzzer. Much bigger.

How to turn off the buzzer:

    Press and hold the release button for more than 2 seconds, the  

JHE42B Finder turns off the sound.

    The JHE42B 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  

automatically charge the JHE42B Finder (the red LED will light to  

indicate that charging is in progress).

Size:    23*17*17MM

Weight:  7.4 g