Motorola Gp399 Walkie TalkieThe Dual Push to Talk (PTT) Advantage The GP399 Series represents a breakthrough in hand held transceiver (HT) technology, featuring a revolutionary dual push to talk (PTT) button. The rocker style PTT switch enables seamless communication across two frequencies. Pressing up transmits on "Frequency A", while pressing down transmits on "Frequency B". Furthermore, either frequency can function as a channel scanner, allowing users to monitor multiple
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