HME DX300ES Digital, 2.4 GHz Wireless Headset System for Public Safety/Tactical Applications – Supports hands-free, two-way, digital operation for three users. Two-channel interface permits 17 users to simultaneously monitor crew activities and external radio traffic. Highly portable, compact design. Very quick and easy to set up and operate. HME's distinctive Spectrum Friendly technology avoids interference with other agile equipment, like WIFI and wireless DMX lighting systems, through designation of the optimal 2.4 GHz operating frequency range – low, high or full band. No license requirements. Features include dedicated channel relays, battery operation, and four-wire audio interfaces. Continuing more than 35 years of technological innovations.