Startechcom usb adaptor cables startechcom icusb232d the icusb232d 1 port usb to serial adaptor from startechcom lets you add an rs232 db9 serial port to your laptop or desktop computer through usb so you can connect to monitor and control a serial devicefor easy connections the adaptor features a female usb type b port so you can choose the length of usb cable needed to reach your serial device 6ft18m usb a b cable includedthe usb to rs232 adaptor is a convenient and cost saving