4 Input Modulator with integrated IR engine, 25dBmV/fixed output, wide channel range, push button Economical 4 Input Ultra Band 65-135, UHF 14-78 (Excluding 95-99) The E-Series IR Modulators are like no other IR controlled Modulator.Install up to 8-Way for IR-4101 IR Receiver to be installed at each TV location, Channel Vision's IR over coax is the only IR sytem that does not require a power supply at each TV location,The IR Modulator supplies the power!