Original ESP8266 Development Board

The NodeMCU is an open-source firmware and development kit that helps you to prototype your IoT product within a few Lua script lines.

Build on ESP8266 sdk
Build on CP2102 USB to TTL
Lua core based on eLua project
cjson based on lua-cjson
File system based on spiffs
Easy to access wireless router
Based on Lua 5.1.4 (without debug, os module.)
Event-Drive programming preferred.
Build-in json, file, timer, pwm, i2c, spi, 1-wire, net, mqtt, coap, gpio, wifi, adc, uart and system api.
GPIO pin re-mapped, use the index to access gpio, i2c, pwm.
Both Integer version(less memory usage) and Float version(Default) firmware provided.

Features:
Now supports the arduino IDE 1 with Arduino ESP8266
Uses WiFi Module – ESP-12E.
USB – Power 5v and program via micro USB port
CP2102 USB TTL Module
Fits on a standard breadboard and gives access to a row of holes either side
10 GPIO, every GPIO can be PWM, I2C or 1-wire
Headers – 2 x 2.54mm 15-pin header with access to GPIOs, SPI, UART, ADC, and power pins.
Misc – Reset and Flash buttons
Dimensions – 49 x 24.5 x 13mm
USB-TTL included, plug n play
FCC CERTIFIED WI-FI module, PCB antenna

If you need more units I can provide it for you. This is great for DIY projects. Goods once sold cannot be refunded.