The Eartec UL321 is a professional full duplex intercom for three people that need to communicate and work with their hands. This compact system features UltraLITE single and double ear wireless headsets, one Master that sets the digital sequence, and two Remote headsets. UltraLITE utilize Digital Enhanced Cordless Technology (DECT) to provide professional, simultaneous wireless communication within a quarter mile range. The UltraLITE series are a breakthrough because all electronics, including the battery are built right inside the headset earcups, eliminating wires and belt worn radios. The system does not require a base station, and the headsets are field programmable, meaning that the system can be expanded at any time. No FCC License Required