Drone Finder JHE42B/JHE42B_S 5V 110dB Super Loud Buzzer FPV Tracker W/LED Buzzer Alarm for For FPV Drone Flight Controller Features: The buzzer has two working modes: 1.It is compatible with the traditional active buzzer function and synchronized with the drive of the flight control. 2.When normally connected to the flight control,if the main battery is disconnected during the flight,it can still automatically emit a 110dB dropping sound after 30 seconds of disconnection,while the LED will emit a white light and the Sound is much louder than a normal buzzer. To turn off the buzzer. Press and hold the release button for more than 2 seconds to turn off the sound of the JHE42B Finder. JHE42B Finder is compatible with all BF,CF flight controls. Just connect to the buzzer port of the flight control and it will work.When the flight control is wired correctly,the multi-rotor will power up and work,and the power supply of the Flight control will automatically charge the JHE42B Finder(the red LED will light up to indicate charging is in progress). Specification: Styles:JHE42B/JHE20B/JHE42B_S(Optional) Package Size:11*7 Weight:10g Package includes: 1*Buzzer(Optional)