Motorola RDX 4-Watt 16-Channel UHF Display Radio The RDU4160D 4-Watt 2-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 12.5kHz mode. An easy-to-read Display and five programmable buttons enable quick access to features. Enhanced 