I would recommend using a real HT instead of a SA818-based product, as the SA818’s are known to be noisier and are more complicated to configure. Why pay $90 for a no-name box with poor if any documentation when you could get an HT such as a Retevis RT-85 for under $20, which have an LCD display, keyboard, excellent audio quality (~60dB SNR) and are FCC-certified, and then get a small USB Radio Interface (< $50). Demo video of a Full-duplex node using 2 RT85s and an AllScan URI100. This demo video is of a full-duplex node but a half-duplex node is considerably simpler - you’d just need one HT, a URI, and a couple of ~$2 audio cables and you then have have a much better quality node at less than the cost of any SA818 node.
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