This is a single channel relay module with optocoupler isolation and low level trigger designed for reliable switching of loads from microcontrollers and other control systems. It supports multiple input voltage levels and is configured as a drive board for convenient control. Key benefits Electrical isolation between control logic and the relay load via optocouplers, improving safety and reducing interference. Low level trigger operation, allowing activation when the control signal is pulled to ground for simple, robust interfacing. Versatile input compatibility with 5V, 12V, and 24V control signals, enabling use with a wide range of controllers and systems. Compact one channel design with integrated drive circuitry for straightforward integration into projects and equipment. Size specification noted as 24V, aligning with the product's coil/drive configuration and intended applications. Key attributes Channel: 1 Trigger type: Low level Input voltage compatibility: 5V, 12V, 24V Coil/Load configuration: Size 24V Isolation: Optocoupler isolation between control input and relay output Drive board: Integrated control/drive circuitry Package: 1 piece (1pcs) Technical details and compatibility Suitable for projects requiring safe interfacing of control signals to a relay load while preserving control electronics from potential coil transients. Works with standard control systems and microcontrollers that provide 5V, 12V, or 24V logic signals. The optocoupler isolation reduces noise coupling and protects the control side from voltage spikes and back EMF. Use cases Home automation and DIY projects: switch lighting, fans, or other appliances controlled by a microcontroller or singleboard computer using a 5V/12V/24V logic signal. Industrial control interfaces: drive a relay from PLC or controller outputs that operate at 5V, 12V, or 24V, while maintaining isolation from the load side. Electronics development and testing: act as a reliable relay driver board for prototyping circuits that require low level triggering and galvanic isolation. Notes This description reflects the product's stated features: low level trigger, optocoupler isolation, 1 channel, compatible with 5V/12V/24V input signals, and Size 24V. No additional features or specifications beyond the stated model are added.