Mainboard small speaker/alamm /motherboard buzzer/computer case buzzer/speaker

Usage scope: After the computer is powered on, we will hear the familiar sound"beep" which usually indicates that the computer is functioning properly. Thissound comes from this "little device". The red wire is the positive pole, and theblack wire is the negative pole (in fact, there is no distinction between positiveand negative. As long as it is connected to the Speakerinterface, it can be used)