Product Features.the Serial Port Can Realize The Power Supply Of Pins 1 And 9 Support Special Baud Rate Industrial Temperature Range: -40 To 85c Independent Power Chip, Can Achieve 5v/12v Power Supply Without External Power Supply. The Computer Host Suitable For Pci-e Slot Can Provide 4 Standard Db9-pin Rs232 Serial Ports, And The Bidirectional Speed Of Full Serial Modem Control Of Each Port Is Up To 25mbps, Which Supports Remote Wake-up And Power Management Functions. Material:pcb Colour:black Pci Express: Single-lane (x1) Pciexpress Endpoint Control With Phy Integration; Compliant With Pci Express 2.0 Gen 1; Compliant With Pci Express Card Specifications; Compliant With Pci Power Management 1.2; Supports Both Legacy And Msi Interrupts; Support Aspm Power Management; Equipped With Short Iron Pieces, Supports 2u Chassis. Serial Port; Dual Uart Or Quad Uart; Supports Rs-232 Full Serial Modem Control Bi-directional Speeds Up To 25mbps Per Port; Supports Hardware And Software Flow Control; Supports 5, 6,