Open-source. Interactive. Programmable. Low cost. Simple. Smart. WI-FI enabled Ard---like hardware IO Advanced for hardware IO, which can dramatically reduce the redundant work for configuring and manipulating hardware. Code like ard--, but interactively in Lua script. Nodejs style network Event-driven for network applicaitons, which faciliates developers writing code running on a 5mm*5mm sized MCU in Nodejs style. Greatly your IOT application developing process. Lowest cost WI-FI CP2102 driver: http://cn.silabs.com/products/mcu/ Information: http://pan.baidu.com/s/1pL1Fgq3 Colour: black Material: PCB Size: 5.85x4.3CM Package Contents: 1 * CP2102 module 1 * Drive expansion board 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.