Las Vegas, Nevada -- Dice Electronics showed off a new HD radio prototype at the SEMA car show (full coverage and slideshow on TechnoRide) will retail for around $400 when it first becomes available in February.

The best part about HD radio is that it's over FM, and it's free. Over 600 stations in the US broadcast in HD, according to the representative at Dice.  However, it'll be interested to see how HD fares against satellite radio.  After all, with HD radio, you still need to be within distance of the radio signal; satellite will always have the edge there.

Dice will have a more fleshed out prototype, and possibly a full product, to show at CES in January.