Phenyx Pro PMT-33-500 Quad Mono Wireless IEM Transmitter For PTM-33Features Crispy mono audio without latency lasts throughout your whole performance. Rugged built receiver with a sleek design. Four stand alone mixes offer a flexible and diverse monitoring experience. The LOOP OUT design for your flexible routing operation. Rack mountable with brackets included in the package. Fuss free synchronization process through IR sync. One transmitter base unit can add as many bodypack receivers as you need. Up to 164ft 50m