(Credit: Insignia) The price of HD Radio technology has been dwindling over the past few years, with digital-capable car stereos and clock radios priced south of $100. But Insignia’s new NS-HD01 adds two new wrinkles to the HD Radio equation. The iPod-sized unit is the first truly portable (battery powered) HD Radio, and its

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Insignia’s NS-HD01 is the first portable HD Radio–and it’s only $50