Node-Mcu V3: Effective microcontroller Esp8266 (ESP-12e) with WLAN 802.11 b or g and 25 dBm integrated antenna. Dimensions (length x height x height): 58 x 31 x 13 mm [High Performance]Built into all available resources on the hard drive unit, it is super easy to add to your existing board for development projects or has I or O pins that provide you with your EZ USB in the fastest way. Modern technology based on sophisticated high-level lua. [Compatible]Convenient by simple programming with Lua script or for code and the compatible construction of the test board (breadboard) (the pin spacing is 28 mm). Compact design: It is an integrated unit with all available resources on board, modern internet development tools such as knots. With the node-mcu with the integrated , can immediately bring his idea to the fast . Colour:black Material:Plastic and Metal Package Contents: 6 x Node-Mcu V3 Lua WiFi Development Board Based ESP8266 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.