Features 1、The product is an onboard mature ESP‑12FWIFI module, which can ensure stable work. 2、The relay is closed continuously for 100,000 times, with strong driving ability and stable performance. 3、With excellent production process and exquisite craftsmanship, the module is not easy to solder. 4、Made of high‑quality materials, the product is light and waterproof, with good insulation properties. 5、The module is suitable for the secondary development of ESP8266 and smart home wireless control. Specification Item Type: Relay Module Material: PCB Working Voltage: DC 7-28V / 5V Purpose: Suitable For The Secondary Development Of ESP8266 Suitable Scenario: Smart Home Wireless Control Package List 1 x Relay Module 1 x Pin