High temperature resistance.Sophisticated look.Made of high-quality materials for a long service life.Simple to use.It is suitable for ESP8266 secondary development and learning, smart home wireless control and other occasions.1. Onboard mature and stable ESP-12F WiFi 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 DC12V;4. Onboard WiFi module RST reset button and a programmable button;5. ESP-12F supports the use of development tools such as Eclipse/Arduino IDE, and provides reference programs in the for Arduino development environment;6. On-board twenty-four 12V/10A relays and output switch signals, suitable for controlling loads whose working voltage is within AC250V/DC30V;7. Onboard power indicator, relay indicator and 1 module comes with LED.8. Onboard three shift registers 74HC595 control relay switch.Size: 165 x 90mmMaterial: PCBcolour: bluePackage Contents:1 x ESP8266 Relay Development Board1 x Single Row Needle 22p1 x Shorting CapOnly the above package content, other products are not included.Note: Light shooting 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.