This rare Alpine CDA-9851 CD MP3 player is a gem for any old school car audio enthusiast. It boasts a 1 DIN unit size and features like satellite radio readiness, an equalizer, a detachable face, and an auxiliary input. The brand and model are Alpine CDA-9851 which makes it a valuable addition to any collection. With its unique features, this MP3 player is sure to enhance the driving experience.