This gray RC214EG remote control is for a DVD player. It has buttons for adjusting power and standby, title, menu, open and close, OSD/setup, slow, fast forward, previous and reverse, next and forward, pause and step, play, and return. The bottom section has buttons that control audio, subtitles, angle, zoom, karaoke, recording, volume, enter, timer, memory, and things like that.
It also has several other serial or model numbers like HTF1148D2 and 20010920 on it.
The battery door is included as shown in the photo.