Portable media center is a term for a handheld multimedia device that can play digital music, image, and movie files that have been downloaded from the Internet or stored on a personal computer. Portable media centers are manufactured by several vendors, including Samsung, Creative Labs, and iRiver International. Initial versions include Microsoft's Media Player.
Devices referred to as portable media centers are typically similar in size and shape to a small paperback book and run on rechargeable batteries. The playing time per battery charge depends on the type of content played, ranging from about 7 hours for movies to 20 hours for music. Portable media centers include small full-color displays; an early model measures about 10 cm (4 in) diagonally. A typical device can store thousands of songs, tens of thousands of image files, or several dozen full-length movies.