LC-Relay-ESP12-1R-D8 single way relay development board carry on ESP-12F WiFi module I/O port is fully extracted, support DC8-80V/USB 5V and other power supply methods. Supply Arduino development environment reference code, suitable for ESP8266 secondary develop learning, smart home wireless control and other occasions. Onboard mature and stable ESP-12F WiFi module ,High capacity4M Byte Flash. Reserve GPIO for ESP-12F. Reserve UART firmware update interface. Onboard WiFi module RST reset button. Onboard 1 channel 5V relay. color: blue Material: PCB Model: LC-Relay-ESP12-1R-D8 Work Voltage:DC8-80V/USB5V WIFI IC: ESP8266 Communication Protocol:UART Load voltatge:AC 250V or DC 30V(Max) Load current:10A(Max) Work Temperature:-25?~85? Work Humidity:5%~95%RH Size:59*48*19mm Package: 4pcs WIFI Relay Switch Module 4pcs 2*7Pin 2.54mm Male Pin 4pcs 2*6Pin 2.54mm Male Pin 4pcs 5Pin 2.54mm Male Pin 4pcs 2.54mm Jump Cap 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.