Here's a breakdown of its features and functions:

Buzzer/Mini Speaker: This component serves as an audible alert system for the computer. It is often referred to as a "buzzer" or "mini speaker" due to its small size and its function of producing sound alerts.

Onboard Installation: The buzzer or mini speaker is typically mounted directly onto the computer motherboard. It is often soldered onto specific pins or connectors on the motherboard designated for audio alerts.

PC Board Beep Alarm: The buzzer is primarily used to emit audible alerts, commonly known as "beeps," to indicate various system statuses, errors, or events. These beeps can convey information about the computer's boot process, hardware initialization, diagnostic results, or error conditions.

Diagnostic Tool: The buzzer serves as a diagnostic tool during the computer's startup process. Different beep patterns or sequences indicate different types of issues or errors encountered by the system. By interpreting these beep codes, users and technicians can troubleshoot hardware problems and identify faulty components.

Case Speaker: In some cases, the buzzer or mini speaker may be housed within the computer case, hence the term "onboard case speaker." This positioning helps ensure that the audible alerts are clearly audible to the user, even if the computer case is closed.

Universal Compatibility: The buzzer is a standard component found on most desktop computer motherboards, regardless of the manufacturer or model. It is a fundamental feature of the motherboard's onboard hardware and is compatible with various operating systems and hardware configurations.