Features: The PC817 optocoupler isolation board delivers antiinterference through photoelectric isolation, enabling voltages conversion from 3.3V/5V to 3.6 30V for driving highly power transistors, MOSFETs, and low power 24V relays, ensuring control in demanding applications. Featuring four independents channels with jumper cap setting for selecting high or low potential output, this module supports simultaneous control of different voltages but has a pulses signals limit below 4KHZ, making it unsuitable for frequencies aboves this threshold to maintain functionality. for enthusiasts, electronics hobbyists, and 3D printing users, this product caters to individuals needing precise voltages isolation solution for customs projects and component integration. for scenarios like 3D printer setups, industrial automation, and electronic circuits where voltages isolation is essential for safely driving relays or power components without interferences. With its ABS construction and straightforward operations, this module offer efficient control, ensuring that activating the input terminals directly the output for seamless integration in various voltages management tasks. Specifications: Driving end signals voltages: 3.6-24V Output terminals voltages ranges: 3.6-30V Board size: 48x38mm Package Includes: 4Pcs 817 Optocoupler 4-Way voltages Isolation Board note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.