Williams AV IR E4 IR+ Infrared EmitterThe IR E4 is not a stand alone system and requires an IR M1 modulator to function. The IR+ features a distributed IR emitter array architecture allowing up to four emitters either stacked together for large room arrays or distributed throughout the room to accommodate wings in room design, balconies or other obscured venue locations. The IR E4 Emitter can be paired with an IR M1 modulator. Up to 4 emitters can be connected to the IR M1 directly, and