Review on 2pcs PC Motherboard Mini Speaker for Desktop Computer Case; DIY Internal Code Mini Plug Beep Alarm Buzzer by Todd Markel

If you build a PC, you should have one of these. Get used to hearing that single boot beep, because if you hear anything else, you'll know to investigate the problem sooner than if you didn't have that problem message. You can google what other beep codes mean you know what's going on on your computer. I have two packages, one permanently on my home pc and the other needs to be kept in my toolbox to work on other pcs.