Built-in TTL -2303HX Serial Controller IC. Standard USB type A male and TTL 3pin connector. Simple serial communication. Super terminal use; commonly used serial debugging tool. Simple and to give USB support to your color: blue Comprehensive material XP system installation process: Downloaded the driver Click the to start the installation, click until completed. Installed correctly; can see in Device Manager - Ports - USB-To-Serial Comm Port (COM3 / port you connected the USB interface will display different) Second, insert the to upgrade small plate, and the system will automatically load the driver for it. Note: TXD and RXD line shorted to normal test module. Available for Linux, , WinCE and Windows (XP, 2003), Vista, Win 7/8 XP system installation process: Downloaded the driver Click the to start the installation, click until completed. Installed correctly; can see in Device Manager - Ports - USB-To-Serial Comm Port (COM3 / port you connected the USB interface will display different) Second, insert the to upgrade small plate, and the system will automatically load the driver for it. Note: TXD and RXD line shorted to normal test module Connection: RX TO TX; TX TO RX; GND to GND Function line Red-VCC, black-GND, Green-TXD, white-RXD Module use 1, install the driver, 2, restart the computer, 3, the module is plugged into the computer's USB interface, the system will automatically install the driver 4 TXD and RXD connected (ie with a line a plug in the TXD an interpolation RXD), the module can spontaneously self-closing, 5, open [serial debugger Package Contents: 1 X LCD Module Display Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.