Most compact disk players support standard audio CDs and recordable/rewriteable discs, commonly listed as CD, CD-R and CD-RW.
Portable compact disk players commonly offer AC power and battery operation; many models include an AC adapter and can also run on batteries (often described as two-way power).
Many compact disk players include AM/FM radio functionality and use either built-in antennas or a telescopic (extendable) FM antenna to improve reception.
Compact disk players are often compact and lightweight; some models add built-in handles and battery operation to make them easy to carry for travel and outdoor use.
Most compact disk players include a 3.5 mm headphone jack and often a 3.5 mm aux-in (line-in) for connecting external devices or private listening.
Many portable compact disk players include anti-skip protection (examples list durations such as 60 seconds) and programmable memory to help maintain stable playback and track order.
