V.TOP USB to DB9 RS232 Serial Adapter Cable with COM Retention for PC and MacOS Users (Black) USB to RS232 serial adapter allows any PC to connect serial devices and programs that communicate through COM ports. Plug and Play, no external power adapter required. Standard USB Type A Male to standard 9-pin DB9 RS-232 serial connector. Operate System Supported: Windows 10/ 8/ 8.1/ 7/ XP & Mac OS X LT Capitan/ Linux / Android. USB to Serial Converter with Prolific PL2303 chipset which is widely used and compatible in most operate system, such as Windows 10/ Mac OS. Designed for connecting Serial devices such as DB9 equipped PCs, routers, GPS, barcode scanners, label writers, serial modems, digital cameras, telscope, palm PCs and digital organizers, for updating firmware.