SONY KEY BOARD REMOTE COMMANDER Remote Commander Mini Disc for Katakana Input RM-D20P This is a keyboard for adding song titles and disc names to MDs. When I inserted batteries, the lamp lit up, so it seems to be usable (photo 3). The tab on the battery compartment lid is broken, so it doesn't close properly, but it doesn't affect use (photo 4). I have been storing it at home. If anyone needs it, I will give it away.