Item Descriptions:-It is made of premium material, which is not easy to wear and comfortable to touch.-Photoelectric isolator, SCM output level can be used to isolating,anti interference and protect SCM some circuit when driving motor.-Isolator High Level Trigger 80KHz, SCM outpput level is low,and driven module voltage is high.-Easy Installation, very convenient and safe to use.Package:2x Isolation ModuleItem Specifications:Size:40x15mmMaximum Signal Frequency:80KHzInput Signal Voltage:DC12V