- The 1 2 4 Channel Relay Module Shield operates at 5V, 12V, or 24V, offering multiple channels for diverse applications, making it a versatile addition to any project. - Featuring an integrated optocoupler, this module ensures electrical isolation, which enhances safety and reliability in your electronic systems. - It supports both high and low-level trigger methods, providing flexibility in control options to meet various project requirements. - Designed as an HW 803B, it guarantees compatibility and stability across different development environments, ensuring seamless integration with your existing systems. - Ideal for expansion board development, this relay module allows you to easily incorporate relay functions into your projects, such as home automation systems, industrial control systems, or robotic applications. - The compact design and robust performance make it suitable for both hobbyists and professionals, enabling efficient control of lights, motors, and other devices. - With its reliable operation and ease of use, this relay module is perfect for anyone looking to enhance their electronic projects with dependable relay functionality.