2. Common Operation
1.To turn on/off the unit
In power off mode, short press any buttons except REL to turn on the unit. In power on mode, long press the POWER button on the front panel or short press the POWER button on the remote control to turn off the unit.
2.To slide the monitor of the Car Audio System out of the chassis
Shortly press the OPEN button on the front panel or long press the OPEN button on the remote control can slide the monitor of the Car Audio System out of the chassis or slide it into the chassis.
3.To select function mode
Press the MODE button to select RADIO, DISC (After inserting a disc), USB(After inserting a USB storage), SD/MMC CARD(After inserting a SD/ MMC card) or AUX mode.
During playback, tapping the 
icon after popping up Keyboard interface can pop up Mode Menu as right image. then tap one icon in it to select your desired mode.
Note: This unit has front and rear USB. Only one will work at a time.
4. To adjust sound level
Rotate the VOL knob on the front panel or press and hold the + or - button on the remote control will adjust the volume level.
5.To mute sound
Press the MUTE button on the remote control to turn on/off MUTE mode. Pressing the POWER button on the front panel shortly also can turn on/off MUTE mode.
6.To display clock time
Press the CLK button to display clock time on the small monitor of the front panel. After sliding the monitor into the chassis, pressing the CLK button can display clock time on the small LCD.
7.To select a desired EQ mode
Press the EQ button on the remote control to select one of the preset music equalizer curves: POP, ROCK, CLAS, FLAT. The sound effect will be changed.
8.To turn on/off LOUD mode
Press the LOUD button on the remote to turn on/off LOUD mode.
When turning on LOUD mode, it will enhance bass level immediately when bass is not enough.
9.To reset the player
When the monitor , the small LCD display or some buttons are not working or sound is distorted, press the REL button and detach the front panel from the main unit, then press the RESET button to reset the program to factory default.
4.23.2 LANGUAGE SETUP
OSD LANGUAGE
This item is for selecting the language of the SYSTEM MENU and all operating prompt interface displayed during playback.
AUDIO LANG
This item is for selecting a audio language.
SUBTITLE LANG
This item is for selecting a subtitle language.
MENU LANG
This item is for selecting a disc menu language.
4.23.3 AUDIO SETUP
AUDIO OUT
There is only ANALOG mode, i.e. SPDIF/OFF, not optional.
KEY
It is for selecting your desired basic music tone(from low to high).
4.23.4 VIDEO SETUP
BRIGHTNESS
It is for adjusting the brightness of the video output.
CONTRAST
It is for adjusting the contrast of the video output.
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