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AVIATION / Navigation & indicators / REVIEWED 2026-09-11

F02Buzzer & locator

Provide audible status and a location cue.

Manufacturers & products

A buzzer can identify arming state or help recover a landed quad. A backup-powered finder, a DC audio indicator and an externally driven piezo element are three different levels of assembly.

American sourcing options appear first. A U.S. company or distributor label does not establish U.S. manufacturing. The origin notes identify the specific evidence and any limits.

manufacturer

PUI Audio

AI-1027-TWT-5V-2-R

Self-driven electromagnetic audio indicator for a custom alert circuit. [1][2]

U.S. company

PUI identifies Dayton-region US headquarters and separately describes inspection after parts arrive from manufacturing. This is a US-company listing, not proof that this indicator is manufactured in the USA. [1][2]

Program / application

Upstream buzzer component; requires mounting, switching and any desired backup-power circuit [1][2]

Company location: Dayton region, Ohio, USA

Manufacturer inquiry

Official product page provides a catalog or inquiry route; verify current stock, revision, firmware and connectors before ordering.

View product & inquiry route

distributor

Adafruit

PS1240 piezo buzzer (product 160)

US retail route for a compact externally driven piezo sound element. [5][6]

U.S. distributor

Adafruit identifies current operations in Brooklyn, New York. This third-party piezo listing does not establish US manufacture of the component. [5][6]

Program / application

Upstream sound element; not a complete autonomous lost-model alarm [5][6]

Company location: Brooklyn, New York, USA

Online catalog / ordering

Official product page provides a catalog or inquiry route; verify current stock, revision, firmware and connectors before ordering.

Product scope & qualifications

Requires an audio-frequency drive waveform; it is not interchangeable with a DC self-driven indicator.

View catalog & ordering

manufacturer

VIFLY

Finder V2

Backup-powered recovery alarm that can continue signaling after main-battery disconnection. [3][4]

International supplier

VIFLY's contact page gives a Hong Kong company address. A factory-building address does not establish where this particular alarm is manufactured. [3][4]

Program / application

5-inch recovery-accessory candidate; verify harness and disarm access [3][4]

Company location: Hong Kong

Online catalog / ordering

Official product page provides a catalog or inquiry route; verify current stock, revision, firmware and connectors before ordering.

Product scope & qualifications

The listing's 'battery included: No' field conflicts with its backup-battery description; confirm the supplied assembly.
The advertised sound level lacks distance/weighting conditions, so it is not a directly comparable acoustic rating.

View catalog & ordering

What remains unverified

A product-specific US-manufactured complete finder was not established in this bounded shortlist.
Sound-pressure test conditions were unavailable for VIFLY; its value is intentionally omitted from examples.
Buzzer-drive compatibility requires the actual FC schematic and alarm instructions.

Where it comes from

A company address is shown separately from a published factory location. Request the manufacturing site and lot traceability for the exact part when sourcing.

What to compare

Assembly type
Decide between a ready-made finder, an active indicator or a passive transducer.
Backup power
A buzzer powered only by the flight battery cannot continue after battery ejection.
Drive interface
Check active-low FC buzzer output, supply, driver current and oscillator requirements.
Sound pressure conditions · dB
Compare acoustic ratings at the same distance, voltage and weighting.
Runtime · h
Distinguish continuous sound, intermittent alarm and sleep-mode conditions.
Mounting
Keep the sound port clear and retain the unit after a crash.
Mass and dimensions · g
Include battery and harness, not just the acoustic element.
Arming and recovery
Confirm how the finder arms, detects power loss and is silenced after recovery.

Selection & integration notes

For recovery after battery separation, evaluate a complete backup-powered alarm rather than only a louder sound element.
Leave physical access to the disarm control and ensure it remains accessible through the frame.
Do not compare unqualified '110 dB' advertising with a measured acoustic datasheet value.

Published product examples

2 REFERENCES

Specifications belong to the named product and configuration.

AI-1027-TWT-5V-2-RPUI Audio

Voltage: 5 V DC rated; 3–7 V operating range[1]Self-driven indicator per manufacturer product table.
Envelope: 9.6 × 9.6 × 5 mm[1]Width/length/height from the product dimensions.
Mass: 1 g[1]Indicator only; no backup cell or circuit.

Example sources [1][2]

Finder V2VIFLY

Mass: 5 g[3]Manufacturer item-weight field; confirm supplied assembly.
Backup battery: 80 mAh LiPo[3]Product battery-type specification; conflicting included-battery field requires confirmation.
Claimed working time: Up to 30 h[3]Manufacturer claim; exact alarm duty cycle and ambient conditions are not specified.

Example sources [3][4]

Sources & references

REVIEWED 2026-09-11

Manufacturer pages and technical documents support the linked claims. A review date is not a publication date or stock check.

AI-1027-TWT-5V-2-R indicator PUI Audio · Publication date not stated
Self-driven indicator supply, mass and mechanical envelope; catalog inquiry.
Accessed 2026-09-11
About PUI Audio PUI Audio · Publication date not stated
Dayton-region company headquarters and separation of manufacturing from US inspection.
Accessed 2026-09-11
VIFLY Finder V2 VIFLY · Publication date not stated
Backup-powered recovery alarm; mass, battery capacity and inconsistencies in listing.
Accessed 2026-09-11
Contact VIFLY VIFLY · Publication date not stated
Hong Kong company address; not a product manufacturing-country claim.
Accessed 2026-09-11
PS1240 piezo buzzer Adafruit · Publication date not stated
US retail route for externally driven piezo element; not complete recovery alarm.
Accessed 2026-09-11
About Adafruit Adafruit · Publication date not stated
Current Brooklyn, New York operations; many products made locally, not a blanket SKU-origin guarantee.
Accessed 2026-09-11