CH340G chips, the chips are STC's officially recommended USB-to-TTL chips. Incompatibilities may appear due to different drivers on different computers.
 Not only does it have the power light PWR, but there are also TXD and RXD indicators. Reserved RTS, CTS locations are absent; this facilitates intuitive understanding of whether the product is working.
Support WINDOWS 98/ME/2000/XP/Server 2003/VISTA/Server 2008/Win7/Win8 32-bit/64-bit