... hidden audio video components, frequency ranging from 20Khz to 60Khz2.With 4-ports IR distribution Hub, Can control up to 8 ... & 4m cord and mini-plug connector5. Standard IR Receiver with one foot cord, and 4-pin DIN connector Plug-in ... . CE & Rohs Certified Hidden IR repeater system, IR extender, Infred receiver, Infrared emitter, Blink eyes