HAING USB to RS232 DB9 adapter connects USB ports to serial devices (modems, barcode scanners, PDAs, etc.) with up to 1Mbps transfer rate. USB-A to DB9 male (RS-232). Not a USB-to-VGA adapter. Tinned copper conductors, triple shielding, USB-powered. Easy plug & play after driver install. Uses Prolific PL-2303 chipset. Supports Windows (11 to 98), MacOS 8+, Linux 2.4+.