Innovative 4-channel IEM. Designed for Live Band. The PTM-33 wireless IEM system tackles the challenges of floor monitor in live performances, allowing you to freely move on stage, engage with fans, and share a monitor station with your bandmates while personalizing your monitoring experience. The flexible and diversified mono monitoring experience lets you focus more on your content. With peerless 4 channels under one roof, the exceptional entry-level monitoring solution allows you to better navigate your music adventures. Features Crystal-clear mono audio without latency lasts throughout your whole performance. The LOOP OUT design for flexible routing operation. Four stand-alone mixes offer a flexible and diverse monitoring experience. Selectable UHF frequency design to avoid interference easily. Quick IR sync and one-touch frequency selection for fuss-free operation. One transmitter base unit can add as many bodypack receivers as you need. Rugged-built receivers and bodypacks with a sleek design. Rack-mountable with brackets included in the package. Up to 164ft/50m free operation range. Operates in the 900MHz/500MHz range. 902.35-927.6MHz (4x25 frequencies); 542.55-579.8MHz (4x25 frequencies).