A 5V active buzzer solders to the buzzer pads on your PDB or flight controller. It sounds when the board drives the beeper output. The 6-pack at $7.49 gives you spares across builds. The buzzer measures 9 mm across and 5.5 mm tall, with two through-hole pins. Use it for lost-model beeps and arming tones on an FPV quad.
Where do the two pins go?
The 5V buzzer has two through-hole pins that solder straight to the buzzer pads on your PDB or flight controller.
One pin takes the beeper signal, and the other takes ground, so the board drives the buzzer output directly.
The pads sit near the flight controller edge on most PDB layouts, next to the 5V rail.
What does the buzzer sound like in flight?
The buzzer sounds when the board drives the beeper output, so it plays arming tones and warning tones.
After a crash, the beeper sounds while the battery stays connected, and you find the quad by ear.
The 9 mm buzzer is small enough to fit tight builds without adding weight.
When does a finder buzzer with a battery win?
The JHE finder buzzer at $8.97 adds a backup battery and a white LED to the same 5V job.
It sounds the alarm and lights the LED 30 seconds after power loss, so a dead quad still calls out.
It works as a normal flight controller buzzer in flight, then switches to the backup battery on power loss.
How do you mount a 9 mm buzzer?
The buzzer measures 9 mm across and 5.5 mm tall, so it tucks into tight frames.
Solder the pins, then secure the body with a small dab of glue or a zip tie.
Keep the sound hole clear, so the beep carries as far as possible.
What did we check on the bench?
We matched the 9 mm size, the two pins, and the PDB mount to the 6-pack listing.
We matched the 30 second backup alarm and the white LED to the JHE finder listing.
We counted 2 images on the 6-pack listing and 6 on the JHE finder listing.
Quick comparison
| Buzzer | Size | Sound | Backup battery | Price |
|---|---|---|---|---|
| 5V Active 6-pack | 9 x 5.5 mm | Beeper tones | No | $7.49 |
| JHE20B | 22x12x9.5 mm | 100dB | Yes | $8.97 |
| JHE42B-S | 18x17x15 mm | 100dB | Yes | $9.09 |
| JHE42B | 23x17x17 mm | 110dB | Yes | $9.17 |
Steps
- Find the buzzer pads on your PDB or flight controller.
- Solder the two buzzer pins to the pads.
- Power the quad and arm it to hear the tones.
- Check the beeper in Betaflight if it stays silent.
- Secure the buzzer body so it cannot shake loose.
Frequently asked questions
Does the buzzer need its own battery?
No. The 5V buzzer runs off the flight controller, so it sounds only while the quad has power. The JHE finder adds a backup battery for power loss.
Which pads does it solder to?
It solders to the buzzer pads on your PDB or flight controller. The board drives the beeper output, so no extra parts are needed.
How loud is the 6-pack buzzer?
The listing does not state a decibel rating for the 6-pack buzzer. The JHE finder lists 100dB or 110dB, depending on the version.
Can I use it on a fixed-wing build?
Yes, if your flight controller has a buzzer output. The buzzer sounds whenever the board drives the beeper output, on any airframe.
Parts used
JHE Finder Buzzer with LED Alarm, 5V, 100-110dB (JHE20B / JHE42B / JHE42B-S), $8.97
HiLetgo SFM-27 95dB Alarm Buzzer, 3-24V, Continuous Beep, 5-Pack, $13.47
Related buying guides on Quality RC Parts
How to Wire a 5V Active Buzzer on an FPV Racing Drone
HiLetgo SFM-27 95dB Alarm Buzzer: Wiring, Mounting, and Uses
How to Choose a Bluetooth Flight Controller Stack for FPV
Browse all the guides on the Quality RC Parts Drone Guides hub, or start at the Quality RC Parts store.
Sources
Quality RC Parts stocks parts in New York, USA and ships in-stock orders in 1-2 business days.
Last updated: 2026-11-11.