LC-Relay-ESP12-1R-D8 single way relay development board with ESP-12F WiFi module, I/O ports fully accessible, supports DC8-80V or USB 5V power supply. Includes reference code for development environment, suitable for ESP8266 secondary development learning, smart home wireless control, and other applications. Onboard ESP-12F WiFi module with 4MB Flash memory. GPIO pins and UART firmware update interface reserved. Integrated WiFi module reset button and 1-channel 5V relay. Color: Blue Material: PCB Model: LC-Relay-ESP12-1R-D8 Operating Voltage: DC8-80V / USB 5V WiFi IC: ESP8266 Communication Protocol: UART Load Voltage: AC 250V or DC 30V (Max) Load Current: 10A (Max) Operating Temperature: -25C to 85C Operating Humidity: 5% to 95% RH Dimensions: 59 x 48 x 19mm Package Includes: 3 x WiFi Relay Switch Module 3 x 2 x 7Pin 2.54mm Male Header 3 x 2 x 6Pin 2.54mm Male Header 3 x 5Pin 2.54mm Male Header 3 x 2.54mm Jumper Cap Content limited to items listed; other products not included. Note: Lighting and display differences may cause slight color variations between image and actual item. Measurement error allowed within +/- 1-3cm.