The 6 Channel 5V Opto Isolated Relay Module is a versatile switching board designed for safe and reliable control of AC and DC devices. Featuring opto-isolator protection on each channel, it provides better electrical isolation between low-voltage microcontrollers (like Arduino, Raspberry Pi, ESP32) and high-voltage loads, reducing interference and improving safety. Ideal for home automation, IoT systems, robotics, and industrial control projects, this module can switch lights, fans, pumps, and motors with ease. Widely used by engineers, hobbyists, and students in Bangladesh, it comes with LED indicators, screw terminals, and durable PCB construction for long-lasting performance.