Earbuds are commonly issued as freebie headphones with portable players, but higher-performance earbuds can offer sonic performance that rivals their full-size line mates. Their tiny earpieces rest on the outer ear or need to be inserted into the ear canal. Ultracompact and lightweight, earbuds are the most portable of all headphones, and they can provide excellent isolation from external noise when paired with a well-fitted tip.
Not a fan of the bulk that comes with over-the-ear headphones? Check out some of the best in-ear models around.

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does it work as earplug?