Startech ICUSB2324I, Port-4, Bus USB 2.0, Data Bits 7,8, FIFO 256 Bytes, Max Baud Rate 921.6 Kbps, MTBF 282713.5 hours, Connector 1 - USB B (4 pin) Female, 4 - DB-9 (9 pin, D-Sub) Male, USB-Powered, Black, 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. Add 4 DIN Rail-mountable RS232 Serial ports to any system through USB. The ICUSB2324I 4-Port Industrial USB to Serial Hub with DIN Rail Clips converts a single USB port into four RS232 serial ports, enabling you to connect to, monitor and control your serial devices.