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); […]