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Amazon.com: AURSINC Allstar RF Node UHF SR-FRS Radio Programming Module Pi-hat for Allstar, Echolink, APRS, Digital Modes Compatible for Raspberry Pi 2/3/4 | Pin to Pin Replace SA-818 Module| UHF Freq 400-470 :
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Amazon.com: KUIDAMOS Portable Radio Interface,Digital 420‑450MHz Module Interface for Ham Allstar Repeater Controller Amateur Ham UHF Frequency Range for RPi2 RPi3 RPi4 : Electronics
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