1. RESET: Location Retrieral.
2. AC3/5.1CH: 5.1CH Aux input
3. 2.1CH: 2.1CH Optput mode
4. VOL+: Volume Upw ard Adjustment Button
5. MUTE: Mute Function Selection.
6. SW-: Subwoofer Downward Adjustment Button.
7.VOL-: Volume Downward Adjustment Button.
8.CEN+: Center Channel Level Upward Adjustment Button.
9.SL+: Rear Left Channel Level Upward Adjustment Button.
10.SL-: Rear Left Channel Level Downward Adjustment Button.
11.CEN-: Center Channel Level Downward Adjustment Button.
