Features: This 1 channel optocoupler relays module features 3V/3.3V high level driving capability with optical isolation, enabling safe 10A load control while protecting microcontrollers from voltages interferences. Equipped with LED status indicators, screw terminals, and compactly design, it ensures compatibility for microcontrollers for seamlessly integration into automation projects. Ideal for electronics engineers, IoT developers, and DIY enthusiasts requiring reliable relays control in industrial systems or intelligent home setups. Perfect for switching appliances/lights in automation, laboratory testing rigs, or educational demonstrations of optocoupler isolation principles. Its industrial optocoupler isolation technology and broad microcontroller compatibility make this relays driver module essential for building stable, interferences resistant control systems. Specifications: Component:Plastic Option Type:1pc,3pcs; Size: Approx.70x12mm/2.75x0.47inch Working voltages: 3V/3.3V Applicable scenario:intelligent home: controls the switches of lighting and home appliances to achieve intelligent management. Package Includes: Package A 1pc Drive Control Module Package B 3pc Drive Control Module note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.