CH340G chips, the chips are STC official recommendation USB to TTL chips will not appear due to a different drive  different computer as a result of incompatibilities! ! !
 Not only have the power light PWR, There are TXD and RXD indicators?Reserved RTS, CTS location in the absence of an instrument to facilitate the 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