Complete clone open source logic development board, USB cable and male header strip (4 pieces to fit into the sockets). Great development board features Amtel ATmega328 microprocessor controller, support ISP and sketches download function, operation from 5VDC or USB input from computer,, 14 I/O pins with PWM function, digital I/O terminals 0-13, analog I/O terminals 0-5. We include a strip of male headers that can be "snapped apart" and soldered into board, if desired. Size 2.1" X 3". Brand new. What you see in the picture is what you get. No schematic or documentation included. You can search the internet for hundreds of how to articles for applications. Sorry, we can't provide any technical help for this item. See our large selection of sensors modules/shields for this board in our ARD Sensors category.