The Sony RM-X101 is a handheld wired remote control designed for compatible Sony car audio systems. This black device enables audio management through integrated buttons, including volume adjustment, track skipping, and numeric keys 1-6. A directional pad with a center select button facilitates navigation, while dedicated keys for SOURCE, MODE, SEL, and ATT provide access to system functions. It also features DISPL and SCAL buttons for display settings and an OFF button.