PC Computer Motherboard Interanal BIOS Alarm Buzzer Speaker 10pcs<br>Description:Material:ABSInterface Size:2.54 pitch，4 pinLength:7cm\/2.76 inchQuantity:10pcs<br>Note:the red line is positive and the black line is negative<br>Package included:10X PC Motherboard Interanal BIOS Alarm Buzzer