The AMP-595 combines an MP3 digital player with an amplifier, two speakers, a SPST relay and push-button. The product was created for public displays with very high playback rates. The sound can be replayed hundreds of times per day with no reduction in media or player life. Sound is stored in the MP3 format, a highly compressed digital format. The basic unit comes with 32MB of storage – enough for about 30 minutes of sound at the highest quality playback rate.