The DTR650™ digital on-site portable radio delivers all the great features of the DTR550 along with managerial capabilities. The radio features operates at 900 MHz and offers enhanced communication options such as Digital One-to-Many Calling (Public Group Call and Private Group Call). It also provides enhanced performance with greater coverage — up to 350,000 square feet or 30 floors (with long whip antenna) — as well as longer battery life and digital audio quality that is clear and crisp within coverage areas.