Monitor Control Board 4 Pin Speaker Out Connection - Computer Hardware - iFixit
10PCS Mini Plug Speaker per PC Interanal BIOS scheda madre del Computer Mini custodia integrata Buzzer Board Beep Alarm - AliExpress
CABLEPELADO Mini altoparlante per scheda madre | Mini Buzzer per PC | cicalino stato scheda madre PC | Speaker Status Motherboard PC | 11 cm | 4 pin : Amazon.it: Informatica
Elite Motherboard Post Speaker, 4 pin - Other Computer Accessories - Memory Express Inc.
How to Connect a PC Speaker to Your Motherboard - YouTube