ESP8266 D1 Mini V2 ESP-12F WiFi Module - ProtoSupplies
ESP8266 ESP-12F improved version for ESP-12e, Wireless Remote Serial WiFi module for Raspberry Pi and microcontroller with free adapter board! – AZ-Delivery
ESP-12E: ESP8266 Serial Port WIFI Wireless Transceiver Module for Arduino
ESP-12F Datasheet
Esp8266 Esp-12e Esp12e Esp12f Esp-12f Wifi Serial Module Board For Arduino Wireless Transceiver Remote Port Network Development - Integrated Circuits - AliExpress
Geekcreit® NodeMcu Lua ESP8266 ESP-12F WIFI Development Board Sale - Banggood USA Mobile
Amazon.com: ACEIRMC ESP8266 ESP-12 ESP-12F NodeMcu Mini D1 Module for WeMos Lua 4M Bytes WLAN WiFi Internet Development Board Base on ESP8266 ESP-12F for Arduino,Compatible with WeMos D1 Mini (5pcs) : Electronics