ITEM NAME:PC817 4-Channel Voltage Converter Module Optocoupler Isolation Driving Module Descriptio n Description: 100% Brand New And High Quality. Durable And Practical. Jumper Cap Can Achieve Output Port Is High Potential Or Pull Down Output. Onboard 4-Channel 817 Are Independent: Can Achieve Different Voltage Control At Then Same Time. Using 4-Way 817 Optocoupler, To Achieve The Control Signal And The Control Signal Isolation, You Can Directly Use The Microcontroller Or Other Devices IO Port To Achieve Voltage Isolation Control, You Can Achieve A Small Voltage Control, The Control Side Can Be An External Transistor MOS Tube Or Different Voltage Levels Of The Device Interface. Specifications: Material: PCB Board Color: Picture Color Driving Port Signal Voltage: 3.6-24V Output Port Voltage Port: 3.6-30V Board Size: 48*38mm Long Side Hole Distance: 42mm Wide Side Hole Distance: 32mm Package Included: 1 *Â PC817 4-Channel Voltage Converter Module Note: 1.Due to the manual measurement and different measurement methods, the actual size could be slightly different. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. We offer you what you need! PC817 4-Channel Voltage Converter Module Optocoupler Isolation Driving Module.Jumper Cap Can Achieve Output Port Is High Potential Or Pull Down Output. We want to make sure you are happy with our item. Goods without RMA number will NOT be accepted. We'd like to settle any problem in a friendly manner.