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The iconic Motorola walkie-talkie is entering the smartphone age - The Verge
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Mobile radio telephone - Wikipedia
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Two-Way Radios versus Cell Phones – Which is Best for Business? - Highland Wireless: Providing In-Building Distributed Antenna Systems (DAS)
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Direct PTT i800 Smart PTT Device. Two Way Cellular Radio Hybrid With Full GPS Tracking & Global Coverage. | Eventtone
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CHAPTER 6
Land Mobile Radio - KENWOOD USA
