What is the ShortWave Radio?

What is the ShortWave Radio? Retevis released a Shortwave radio HS1, the HF SDR Ham Transceiver. But what is the Shortwave Radio? From the wikipedia: Shortwave radio is radio transmission using shortwave radio frequencies. There is no official definition of the band, but the range always includes all of the high frequency band (HF), and generally extends from 1.7–30 MHz (176.3–10.0 m);…

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The difference of RT5 and RT21

Sometimes customers ask us:I want walkie talkies to communicate with others,I like RT21 and RT5,which radio do you recommend?They are all analog radios,what the difference of these two radios?Let detailed discussion it. Output power The power of RT21 is 2.5W,the usual transmission distance of the peer is 0.5–2.5miles,RT5 is 5w radio,so in the communication distance,RT5…

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