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How to Make Wireless Walkie Talkie Using Arduino at Home / 1.5 K.M Range / Optional range 15 km - YouTube
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Adafruit RFM96W LoRa Radio Transceiver Breakout - 433 MHz [RadioFruit] : ID 3073 : $19.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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