WiFiESP8266 + 32MB, this module is based on extensive exploration of ESP8266 SoC. Added 32MB of extra memory size. Better for library projects. 't worry about memory size. There are USB-TTL serial converter CH340G, mini USB socket. DC 4~9Vdc PowerIn Pin VIN. 2.54 mm (0.1 in) pitch 15 x 2 wire pin set (not soldered). Combining a WiFi access point and a function station + microcontroller using a programming language is simple. Can be used for IDE event- API network application 10 D0~D10, PWM function programming, IIC and SPI communication, on-board WiFi wireless network and (A0 etc. can be used as access point and/or station, hostServer), connected to the Internet, To or upload data, the development board can use the mount board. Type: Module Size: 5 x 2.6m x 0.4cm Material: PCB colour: black Package Contents: 1 x Module 2 x Pin Header Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.