Yamaha CDX-900U is a compact disc player with advanced capabilities. It allows users to play music from CDs and offers various features to enhance the listening experience. The device has a digital audio output for connecting to external audio systems, providing high-quality sound reproduction. Additionally, it supports programming of up to 24 tracks, enabling users to create customized playlists. The CDX-900U also features repeat play options, allowing for continuous playback of a single track or the entire disc.