The ESP32 WiFi 4-Channel Relay Module is an industrial-grade wireless control board designed for smart automation, IoT applications, and remote switching systems. Powered by the ESP32-WROOM-32E microcontroller, the module provides built-in Wi-Fi and Bluetooth connectivity, enabling seamless control through custom firmware, cloud platforms, web servers, and mobile applications.

The board features four high-power 5V relays rated at 10A, allowing safe control of AC and DC loads. Each relay channel includes optocoupler isolation for enhanced electrical protection, noise immunity, and system reliability. With a wide 5.5V to 28V DC input range and onboard buck converter, the module is suitable for industrial automation, home automation, lighting control, security systems, and remote equipment management.