Specifications Type USB to TTL CH340 moduleModule size 55mm 16mmPCB size 33mm 16mmFeatures 1 With CH340G chips which are USB to TTL chips officially recommended by STC will not be incompatible due to different drivers computers 2 There are not only power lamp PWR but also TXD and RXD indicator lamps which is convenient to intuitively know whether the product is working without instruments 3 Support Windows 98 ME 2000 XP Server2003 Vista Server2008 Win7 Win8 Win10 32 bit 64 bit 4 Perfect compatibility with all series of STC single chip computers unlike PL2303 scheme it will not be downloaded because of different drivers Very stable 5 Single chip burning 9 upgrade hard disk maintenance and routing upgrade are the first choice Package Include 1x Module Board