Features 1、For Wireless Control: The module is suitable for the secondary development of ESP8266, smart home wireless control and other situations. 2、High Performance: Onboard stable ESP‑12F WiFi module, large capacity 4M byte for Flash chip, has high performance. 3、Onboard Indicator: Onboard power indicator and relay indicator, and ESP‑12F module comes with a programmable LED. 4、Fine Production: Using excellent PCB board and manufacturing technology, is not easy to appear false welding. 5、Little Interference: The relay module is single channel design, with strong anti interference performance and stable operation. Specification Item Type: Relay Module Material: PCB Working Voltage: DC 7-80V DC 5V Relay Specification: 30A Channel: 1 channel Purpose: Used for the development of wireless control relay on off and embedded system Applicable Scenarios: Suitable for ESP8266 secondary development learning, smart home wireless control and other situations Package List 1 x Relay Module 4 x Pin Sockets 3 x Pin Headers