Many portable speakers sound tinny; high-quality ones usually come with a very high price. These tiny (3-3/4 by 1-3/4 inch) cylinders from Tweakers let your MP3 player or laptop produce big sound for little money. The bright red or silver speakers come with a built-in USB charging cord — a single charge lasts for about six hours of playing time — and they attach together magnetically for easy packing.

$19.95 at Office Depot.

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