Readytosky JHE42B Finder

A buzzer with its own battery that will provide an acoustic alarm even when the main battery is "catapulted" from your machine. After disconnecting the battery, if you do not deactivate the JHE42B Finder, it will start a loud alarm. Buzzer has its own battery which is recharged from 5V on the FC while the machine is operating.

The JHE42B Finder can also be controlled using BetaFlight, same as a standard piezo buzzer.

This is a cheaper version inspired by the miniature HellGate Buzzer.