Disk Jockeys or DJs are entertainers who specialize in playing back pre-recorded music for dances and other special events. The art of the DJ lies in choosing music selections that will please a given audience, and in "mixing" to provide a pleasant interface between the songs. Some DJs also make announcements or remix (rearrange the contents of) songs as part of their show.
DJs use specialized equipment manufactured for their purposes. This includes turntables, CD players, mixers, and karaoke equipment. DJ equipment is typically more shock resistant than the consumer equivalents, as it is regularly transported and is used in high vibration situations. DJ equipment also includes special mixing and queuing capabilities not found in consumer equipment.