Klarheit Car Multi-functional Player New Fm and Mp3 Stereo Radio Receiver Aux with USB Port and Sd Card Slot USB SD MP3 PLAYER FM function,high-fidelity digital electrical modulation radio system (with FM radio function) Full electronic audio processor control volume,Real time clock LCD display function Power off memory function:Characteristics of tertiary memory.1. memory time 2.MP3 can be memory Expedited shipping available, 90 Days Return Policy, 100% Satisfaction Guaranteed. Built-in 4 kinds of EQ mode choice quality,RCA output line (can answer the subwoofer output)