Nady PEM-1000 Wireless In-Ear Monitoring System * 100 selectable UHF frequencies for interference-free performance (Up to 8 systems can operate simultaneously) * Easy setup and use with either automatic Auto scan or manual open-frequency selection, and ASCTM infrared synchronization of selected channel between transmitter and receivers * Rugged, all-metal half-rack transmitter. Rack mountable singly or side-by-side with optional rack kits. * Both transmitter and receiver offer a user-friendly menu with complete control options shown in the LCD display