D1 R1 WiFi Board, Arduino, NodeMCU Compatible

Description based on the chip ESP-8266EX, module ESP-12F Arduino Compatible, you can use it on Arduino IDE. NodeMcu Compatible 11 Digital I/O pins 1 Analog Input pin OTA   — Wireless Upload(Program) On board switching power supply — Max 24V input, 5V 1A output Documentation please see on this page.