1. Onboard and stable ESP-12FWiFi module, large capacity 4M Byte Flash; 2. The I/O port and UART program download port of the WiFi module are all led out, which is convenient for secondary development; 3. The power supply mode supports DC24V respectively; 4. Onboard WiFi module reset button and a programmable button; 5. ESP-12F supports the use of Eclipse/for IDE and other development tools to provide reference programs in the for development environment On-board 32-way 24V/10A relays and output switch signals, suitable for controlling loads whose working voltage is within AC250V/DC30V; Onboard power indicator, relay indicator and 1 module comes with LED. Onboard four shift registers 74HC595 control relay switch. ESP8266/32-channel 10A relay development board is equipped with ESP-12F WiFi module, all I/O ports are led out, and supports DC24V power supply mode. Provide For for development environment reference code, suitable for ESP8266 secondary development and learning, smart home wireless control and other occasions. Colour:blue Material: PCB Size:165 x 90mm Package Contents: 1 x Development Board 1 x Single Row Needle 1 x shorting Cap Only the above package content, other products are not included. Note: Light 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.