I'll get to the sound quality issues in a moment. First, let's look at the design upgrades. The S10-HD measures 5 by 5.5 by 2 inches (HWD) and weighs 1.5 ounces, a few tenths of an ounce heavier than before. It's made of a mixture of matte plastic and rubber, with clear, soft rubber ear tips. Motorola bills the S10-HD as sweat proof and water resistant, meaning it's fine for exercising or going for a walk in the rain. The speakers themselves are now recessed in their housings, with new ear cushion interfaces and a newly developed hydrophobic acoustic mesh to keep the speakers sweat proof.
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