Description: The optocoupler isolation design makes it have good anti-interference performance. Professional and exquisite workmanship makes it have strong driving ability and stable performance. Simple and convenient installation will not waste time and energy. Multiple working voltages allow you to choose the most suitable one according to your needs. Made of plastic material, it is very durable to use. There are three specifications for you to choose from: 5V, 12V, 20V. It is suitable for circuit testing, experiment, workshop, controlling, DIY and so on. Item Name: Relay Module Material: Plastic Current: More Than 100mA Power Supply Voltage: 5VDC Load: 250V 10A AC or 30V 10A DC Features: Stable Performance, Good Anti-interference, High Level Release Wiring Instructions: VCC: System Power Positive GND: System Power Negative In1--in2: Relay Control Port (do Not Reverse) Size Details: 5V: 1.7cm x 4.33cm/0.67" x 1.7" (Approx.) 12V: 5.6cm x 7.6cm/2.2" x 2.99" (Approx.) 24V: 5.6cm x 13.8cm/2.2" x 5.43" (Approx.) Hole Diameter: 0.31cm/0.12" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. The status indicator is on when the inverter is closed, and off when it is released. Package Includes: 1 x Relay Module