The MRF-350 receives Narrow Band RF (radio frequency) signals via the RFX-250 RF Sensor (antenna module). The RFX-250 displays RF interference via a bright red LED which flickers when interference is present. Simply relocate the RFX-250 out of the interference area to resolve the problem. You can control six identical components or zones — Up to fifteen MRF-350s in the same installation. The MRF-350 has six addressable IR Line Outputs. For example, you can control up to six identical TVs with one MRF-350 or route volume commands for a specific zone to a particular zone IR input on a multi-zone pre-amp. If you have more than six identical components or zones, up to 15 MRF-350s can be separately installed to control them—thereby allowing up to 90 identical components or zones in one house. The MRF-350 is compatible with the MX-6000, MX-3000, MX-980, TX-1000, MX-950 and MX-900, MX-880, MX-850, MX-810, MX-650, MX-450, MX-350 remote control. Each can be programmed to specifically control compo-nents in a particular room by installing a base station at each location. In operation, it's simple: when selecting a device located in the Den, the remote only send commands to the Den. When selecting a device located in the Family Room, the remote only sends commands to it.
Your installer may recommend the MRF-350i. The specifications are exactly the same except that i-series products operate at a 433MHz (the other RF products transmit and receive at 418MHz). All i-series base stations must be matched with i-series remotes.