This RS2181i remote operates the RCA Digital Music Studio Universal iPod Dock which is an audio player that connects to an iPod to play mp3's.
This black RS2181i RCA remote control has buttons for equalizer, program, timer, clock, shuffle, intro, repeat, band, fm station, info, folder, preset, mute, select, menu, power, and source selection.
The last photo is of the RS2181i audio system that the remote works with. It is not for sale with this listing and is provided to help you recognize the player that corresponds to this remote control.