Feature 1 RELAY MODULE: An on board mature stable ESP12F WiFi module with 4M Byte Flash large capacity, has high working efficiency. 2 SUPPORTING PROGRAM: Supporting for various development tools, can offer offer you reference program under development environment. 3 APPLICATION: Suits perfectly for ESP8266 secondary development learning, smart home wireless control, intelligent control, etc. 4 FUNCTION: This relay module is flexibly applied for wireless control relay on and off, and the development of embedded system. 5 EASIER USING: The I/O port of the WiFi module and the UART program download port are all led out for secondary development.Item Type: Relay ModuleMaterial: Printed Circuit BoardWorking Voltage: DC 24VRelay Module Specification: 10ARelay Module Channel: 16 ChannelFunction: Used for wireless control relay on and off, and the development of embedded system. Applicable Scenarios: Suitable for ESP8266 secondary development learning, smart home wireless control and other occasions. Package List1 x Relay Module3 x Pin Header1 x Pin SeatNoteDo not use the product in an electrostatic environment, otherwise static electricity will damage the electronic components.