Combining the best of two-way radio with digital technology, the MOTOTRBO XPR 4550 digital mobile radio delivers increased capacity, exceptional voice quality and integrated data communication via the industry’s largest third party application developer program. MOTOTRBO is built to the globally recognized ETSI DMR Tier 2 standard. Available in UHF and VHF frequency bands, the XPR 4550 features an integrated GPS module, alpha-numeric display, up to 1,000 channel capability, four programmable buttons, large volume knob for ease of use and a powerful, front projecting speaker. Pearson social studies grade 4 pacing guide georgia. Additional Information.