3-input modulator Built-in IR over coax system LED display and pushbutton programming +25dBmV output 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!