They’ll never have a dull musical moment once they perch these monkey or penguin speakers on their desk or bookshelf. Each animal’s fuzzy coat surrounds a full-range speaker and volume control for clear, habitat-shaking sound. * plug-and-play design works with a laptop, iPod, CD or MP3 player—any media player with a headphone jack for audio output * can be powered either by 2 AA batteries (available separately) or with a USB port * speakers measure approximately 5″ high * amplifier included