Features 1、The relay module possesses stable performance to meet the needs of various work scenarios. 2、All the program download ports of the WiFi module are led out to facilitate secondary development. 3、With excellent production process and exquisite craftsmanship, the module is not easy to solder. 4、High quality material can make sure the durability and stability of the product. 5、With professional design and reasonable structure, the module is easy to replace and install. Specification Item Type: Relay Module Material: PCB Working Voltage: DC7-12V / DC5V USB Purpose: Suitable For Secondary Development And Learning Of ESP8266 Suitable For Scenarios: Smart Home Wireless Control And Other Occasions Package List 1 x Relay Module 3 x Pins 2 x Sockets