1. This section for the USB-TTL conversion line, the internal use of PL-2303HXD conversion chip, line length 1M, support windowsXP / WIN / 7/82. 6 leads have been drawn, leads to RTS CTS TXD RXD GND 5V:Red: 5VWhite: RXGreen: TXBlack: GNDYellow: RTSBlue: CTS 3. Can be used for a variety of equipment development, debugging, programming, upgrades, Brush and so on.4. Do not crash, undead serial port,