7 【MF/MP3】: shows the current status of MP3 and radio.
8 【USB】: display audio from USB。
9 Radio/MP3 switch】: play radio and MP3. Refer to section 2-3-2 of this manual for details of radio and MP3 operation.
10【Speaker】: play radio and MP3.
2-2-2 Left & Right Handle Bar
Figure 2-9 Throttle & Function keys 1