Startech ICUSB232PRO, Bus USB 2.0, Cable Adapters, Ports-1, Max Baud Rate 921.6 Kbps, Connector 1 - DB-9 (9 pin, D-Sub) Male, 1 - USB Type-A (4 pin) USB 2.0 Male, System and Cable PC with an available USB 1.1 (or above) port, Included 1 - USB to Serial Adapter, 1 - Driver CD, 1 - Instruction Manual. The black, 1' StarTech USB to RS232 Serial DB9 Adapter Cable with COM Retention lets you connect RS232 serial devices to a laptop or desktop through the USB port. This adapter has a baud rate of up to 921.6 Kbps and comes with USB 2.0 technology.