Fangrui Product Details The Product Can Obtain 4 Serial Communication Ports Through The Pci-e Slot Of The Pc Host. It Adopts The Industrys Stable And Ax99100 Chip With Strong Compatibility. Its Good Electrical Performance Design And Stable And Fast Communication Capabilities A Wise Choice For Users Of Automation Engineering Applications The Serial Port Can Realize Power Supply On Pins 1 And 9 Support Special Baud Rate Options Power Chip, 5v/12v Power Supply Can Be Realized Without External Power Supply Computer Host Suitable For Pci-e Slot, Can Provide 4 Standard Db9 Pin Rs232 Serial Ports, Each Port Is Fully Serial Modem Controlled With A Bidirectional Speed Of Up To 25mbps, Supports Remote Wake-up And Power Management Functions Chipset:ax99100 Port Number:4 Serial Port Pci For Express 1x Slot The Product Appearance And Printed Words Depending On The Batch, But This Does Not Affect Use. Colour:black Material:pcb Package Contents: 1 * Pcie Expansion Card Only The Above Package Content, Other Products Are Not Included. Note: