Startech ICUSB422IS, Bus USB 2.0, External Hub, Port-1, Data Bits 7,8, FIFO 256 Byte Receive/128 Byte Transmit, Max Baud Rate 921.6 Kbps, Stop Bits 1,2, Connector 1 - USB B (4 pin) Female, External Ports 1 - DB-9 (9 pin, D-Sub) Male, 1 - Terminal Block (5 Wire), Input 5 DC, Included 1 - USB to RS422/485 Converter, 1 - 6ft USB A to B Cable, 1 - Driver CD1 - User Manual. Add an R422/485 serial port to your laptop or desktop computer through USB. The ICUSB422IS 1 Port Metal Industrial USB to RS422/RS485 Serial Adapter w/ Isolation connects to a computer using USB and allows you to connect any RS-422 or