Description: Optocoupler Isolation: This 1-channel relay module features SMD optocoupler isolation, ensuring strong driving capability and stable performance. It supports high and low level triggering for large current applications Complete Isolation: With complete isolation between the relay control terminal voltage and trigger terminal voltage, this high power relay module has a fault-tolerant that prevents even if the control line is broken Flexible Triggering: The module can be set to high level or low level triggering, providing versatility for different applications. Its reliable performance makes it for various electronic projects High Current Support: Supporting up to 30A 250V, this 1-channel relay module is for applications requiring large current control. Its optocoupler isolation board ensures safe and efficient Stable : The relay module offers stable and consistent , making it suitable for a wide range of DIY and electronic projects. It is easy to install and use, for hobbyists and professionals alike Specification: Color: red. Material: PCB. Size: Approx 7*5*3CM/2.76*1.97*1.18inch. Note: There might be a bit color distortions due to different computer resolutions. There might be a slight errors due to different hand measurement. Package Includes: 1* 1-way relay module