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Diy Kit (2set/lot) Nicerf New Design U Band Uhf 400-480mhz Walkie Talkie Module Sa858 6km~10km Long Range 4w Intercom Rf Module - Replacement Parts - AliExpress
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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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