3: TV mode selection
4: Screen ratio switch(16:9 or 4:3)
5: Setup
6: USB host key: press this key to access USB menu browse.
7: DVD host key: press this key to access DVD play mode.
8: HDD host key: press this key to browse HDD menu.
9: Number key: input numbers or switch channel..
10: Menu: When DVD playback，press this key, will return to DVD menu contents；
When Blu-ray playback, press this key, we can select Volume, subtitle, Chapter.。
11: TITLE: used under DVD mode。
12: Home key: back to the main menu。
13: Return key: return to the previous menu
14: Arrows: up/down/left/right for selecting or remove picture position during
playback pictures or switch TV channels during TV play mode.
15: Confirm.
16: Info key: During playback, press this button to show the information of this
movie(Video format, file name, audio format, play process,)
17: Time seek: Choose a specific time to start play movies.
18: Volume up and down key
