1、WITH OPTOCOUPLER ISOLATION: This 2 channel GPIO relay module features optocoupler isolation, providing enhanced electrical isolation for your control circuits. 2、OVERCURRENT PROTECT: Experience peace of mind with built in overcurrent protect, safeguarding your circuit and connected devices from potential electrical hazards. 3、HIGH LOW LEVEL CONTROL: Enjoy the flexibility of high and low level control options, allowing you to easily adjust and switch between different voltage levels as needed. 4、AUTOMATION CAPABILITY: The GPIO relay module acts as a component in automation control circuits, allowing for precise and efficient control over electrical outputs. 5、VERSATILE USAGE: With its relay common terminal, normally open terminal, and normally closed terminal, this module functions as an electronic switch, providing diverse applications in voltage and current control settings. Item Type: Relay Module Material: PCB Channels: 2 channels Power Supply Voltage: 5V-32V Control Method: High Level/Low Level (jumper cap selection) High Level: 3V-24V Low Level: 0V-1.5V LED Indicators: Power Indicator Light and Relay Status Indicator Light Circuit Design: With overcurrent protect and optocoupler protect functions Output Type: Relay common terminal, normally open terminal, normally closed terminal; can be considered as an electronic switch, does not output voltage or current itself Load Type: Power supply for loads at 104/30VDC, 10A/250VAC 1 x GPIO Relay Module