Startechcom usb adaptor cables startechcom icusb232c2 the icusb232c2 2 port usb to db9 rs232 serial adaptor cable from startechcom lets you connect up to two db9 rs232 serial devices simultaneously to your laptop or desktop computer through a usb port as though the computer offered an onboard db9m connectorthis cost effective solution bridges the compatibility gap between modern computers and legacy serial peripherals and is backed by a 2 year warranty and free lifetime technical support