[High Performance Chip] Original mcs9990cv chip for stable and strong compatibility. ^^ [Enhanced Power Supply] Inductor shielding for power supply stability and heat dissipation with solid capacitors. ^^ [Stable Connection] Equipped with two ps/2 interfaces for connection. ^^ [Easy External Connection] Built-in usb 2.0 pin and extend 2 usb 2.0 ports for external devices. ^^ [Ps/2 Support] Two external ps/2 ports for hot swap of ps/2 keyboard and mouse. ^^ ^^ ^^ ^^ ^^