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Five tiny black cylindrical buzzers with 4-pin connectors

Corn Electronics

Corn Electronics Mini Buzzer 5 Pack audio adapter

SKU CH-KAAA-CXMCC

Five miniature 4-pin motherboard buzzers that emit diagnostic beep codes to identify hardware faults during system start-up

Option 5 Packs

  • Diagnose boot issues with BIOS beep codes
  • 4-pin female connector for plug-and-play installation
  • Compact new-style design fits modern motherboards
  • Five-unit pack provides spares for multiple builds
  • Audible alerts confirm hardware status at startup

Motherboard alarm buzzer pack

This pack contains five miniature buzzers that plug into a desktop motherboard speaker header. Each unit uses a 4-pin female connector and fits the standard front-panel speaker pins. The beep codes emitted by the buzzer let a builder or technician confirm POST status without a display attached. They are intended for system assembly, repair benches and diagnostic testing.

Replaces missing or faulty case speaker

Many modern chassis omit the traditional piezoelectric speaker, leaving no audible POST feedback. These buzzers restore that function and are smaller than legacy case speakers, so they fit tight header areas. The upgrade is worth it when a build has no onboard speaker, when the original speaker has failed, or when a test bench needs a portable, plug-and-play beep device for rapid motherboard verification.

Check header layout and polarity before installing

Verify that the motherboard provides a 4-pin speaker header (often labelled SPK or SPEAKER) and note the pin-out for positive and negative leads. The connector is keyed only by orientation, so align the buzzer’s marked polarity with the board’s silkscreen. No additional power, drivers or BIOS settings are required; the device draws signal current directly from the header.

Highlights

  • Diagnose boot issues with BIOS beep codes
  • 4-pin female connector for plug-and-play installation
  • Compact new-style design fits modern motherboards
  • Five-unit pack provides spares for multiple builds
  • Audible alerts confirm hardware status at startup

Specifications

No published specifications for this item yet.

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Questions about this item

What motherboard connector does the 4-pin female plug on each buzzer fit?

It plugs into the front-panel speaker header on the motherboard, observing the marked positive and negative poles.

Which step during installation is most often done incorrectly?

Reversing the positive and negative pins on the 4-pin connector prevents the buzzer from sounding.

When should a buzzer from the pack be replaced?

Replace a unit if it produces no beep codes during POST despite correct polarity and a known-good motherboard speaker header.

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