... -interference and better EMC, this computing system is widely used in metallurgy, petrochemical industry, electromechanical device, medical and food industry, CNC ... CPU_FAN AudioRealtek ALC888,1x Mic-in,1x Line-out,1x Line-inExpansion4x PCI, 7x ISA Indicator LampPOWER_LED, HDD_LEDSystem ControlPower Switch button, Reset buttonPS/21x ...