One M-501 embedded module
One carrier board with
* one RS-232/422/485 line driver, RJ45 connector
* three RS-232 line drivers, RJ45 connector
* one RJ45 connector for Ethernet
* two USB host connectors
* one USB client connector
* two 20-pin headers for 32x GPIOs
* Status LEDs for Etherent port and serial port
* power input circuitry (9~48VDC)
GNU C/C++ Tool Chain CD and documentation