STARTECH 3ft Usb To Rs232 Db9 Serial Adapter ICUSB232SM3, Bus Type: USB 2.0, Chipset ID: Prolific - PL2303HXD, Industry Standards: RS232, USB 1.1/2.0, Interface: Serial, Port Style: Cable Adapters, Ports: 1, FIFO: 192 Bytes, Max Baud Rate: 921.6 Kbps, Serial Protocol: RS-232, Connector A: 1 - USB Type-A (4 pin) USB 2.0 Male, Connector B: 1 - DB-9 (9 pin, D-Sub) Male The ICUSB232SM3 3ft USB to Serial Adapter Cable lets you connect DB9 RS232 serial devices to your Mac® or PC laptop or desktop computer through an available USB port, as though the computer offered an onboard DB9M connector.