PCWorld – Good things come in small packages–and technology innovators are creating all kinds of them for people on the go. Some of these 10 intriguing mobile gizmos, including a connected GPS unit, external iPhone speakers, a Bluetooth headset, and a gadget charger, are fairly mainstream. The others, well, not so much.

Ruffian Skull Metal Earphones

White earbuds are for pansies. Put these bad boys in your ears, and no one will mess with you–even if you’re listening to ABBA. Even better: Thanks to the sophisticated drivers and tough metal casing, the Ruffians’ audio reproduction is comparable to that of pricey earbuds costing up to four times as much. Besides rocking to your favorite death-metal bands, these buds are appropriate for “Moonstomping, skanking … and anything requiring a helmet,” as well as for listening to Stephen Hawking and “respecting the sweet serenity of those around you,” says Ben Sedaghat, Radius CEO. Available in copper, gold, antique chromium (shown), or nickel black.

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