The RDX series brings workplace noise to its knees by helping to ensure exceptional audio quality in the loudest environments. Designed for noisy areas, our radios are 30% louder than previous Motorola XTN and AX models as a result of new design enhancements. This business essential radio provides the perfect partnership of excellent audio and exceptional durability. The RDU4100 4 W two-way radio operates on an innovative 89 business-exclusive UHF frequencies and is 2013 FCC Narrowband ready. The default factory programming on this RDX radio is set to operate in 12.5 kHz mode. Enhanced audio quality, a rugged design and versatile customer programming software, make this radio an exceptional choice for all of your on-site business needs.