Warning Buzzer & Chime
Specification:

Material: plastic and metal
Usage: Turn on the computer power, and we will hear the familiar "beep" sound, which generally means that the computer can be used normally.
The red wire is the positive pole, and the black wire is the negative pole (in fact, there is no distinction between positive and negative poles, it can be used as long as it is connected to the Speaker interface)
Board alarm tone description

1 short: The system starts normally. This is what we hear every day, and it also means that there is no problem with the machine.
2 short: General error, please enter the CMOS settings and reset the incorrect options.
1 long 1 short: The memory or motherboard is wrong. Try changing the memory. If it doesn't work, you have to replace the motherboard.
1 long 2 short: Monitor or graphics card error.
1 long 3 short: keyboard controller error, check the motherboard.
1 long 9 short: The motherboard Flash RAM or EPROM is wrong, and the BIOS is damaged. Try changing the Flash RAM.
Continuous sound (long beeps): Memory is not seated or damaged. Reinsert the memory. If it still doesn't work, you can only replace one memory.
Keeps ringing: The power supply, monitor, and graphics card are connected.
Check all plugs.
Repeated short beeps: Power problem.
No sound and no display: power problem.
Single product size: 60.00x10.00x10.00mm
Product size: 2.36x0.39x0.39inch

1 x 10PCS Motherboard Buzzer