Startech ICUSB2328I, Bus USB 2.0, Port-8, Data Bits 7,8, FIFO 4096 byte Transmit and Receive, Maximum Data Transfer Rate 921.6 Kbps, MTBF 146,300 Hours, Stop Bits 1,2, External Ports 1 - USB B (4 pin) Female, 8 - DB-9 (9 pin, D-Sub) Male, Included 1 - USB to RS-232 Serial Adapter, 1 - DIN rail kit, 1 - 6 ft USB A to B cable, 1 - Driver CD, 1 - Instruction Manual. The ICUSB2328I Industrial 8-Port USB to Serial Hub with DIN Rail Clips converts a single USB port into eight RS232 serial ports, enabling you to connect to, monitor and control your serial devices.