Feature:1. Facilitate Secondary Development: The I/O port of the WiFi module and the UART program download port are all led out to facilitate secondary development2. ESP-12F WiFi Module: Onboard mature and stable ESP-12F WiFi module, come with large capacity 4M Byte Flasho3. Not Easy to Appear False Welding: Using excellent production technology, which is not easy to appear false welding4. Embedded Systems Development: Adopt high quality PCB materials, used for the development of embedded systems5. Smart Home Wireless Control: Suitable for ESP8266 secondary development, learning, smart home wireless control and other occasionSpecification:Item Type: 2 Channel Relay ModuleMaterial: PCBWorking Voltage: DC7-28V/DC5VRelay Specifications: 30APurpose: For the development of embedded systemsApplicable Scenarios: Suitable for ESP8266 secondary development, learning, smart home wireless control and other occasion.Package List:1 x 2 Channel Relay Module3 x Pin Seat3 x Pin HeaderNote:Do not use the product in a static electricity environment, otherwise static electricity will damage the electronic components.