The DX300ES Wireless Headset System from HME supports hands-free, two-way digital communication, with interfacing for two audio channels for external radio or intercom communication. Spectrum Friendly™ technology prevents frequency conflicts by enabling the user to select all or part of the 2.4GHz operating frequency range: low, high, or full band. The system has no license requirements. Special features include two-channel operation, dedicated channel relays, battery operation, and four-wire audio interfaces. Each base enables three Communicators® to operate in full-duplex, hands-free mode in the two-channel configuration and will support up to 15 users. The system can be expanded by daisy-chaining multiple base stations over standard Cat5 network cable.