USB 2.0 to Serial Port DB9 RS232 Convertor/Cable, with LED, FTDI Chipset. Bridge the gap between antiquated technology and modern IO with this IO CREST SY-ADA15044 USB to Serial (DB-9) RS-232 Adapter. Connect this adapter to an available USB port to allow for bidirectional communication with serial (DB-9) devices. This adapter is ideal for use with barcode scanners, PDAs, and other serial equipment. IO CREST USB to Serial (DB-9) RS-232 Adapter (SY-ADA15044). SYBA SY-ADA15044 IO CREST USB to Serial (DB-9) RS-232 Adapter.