Boss Audio Systems 637UA 14. ST/MO Button, CLK Button, AUX Input Jack, USB Socket, Release Button

2)when press briefly, the radio searches for each preset station in the current band and holds at that preset number for 5 seconds with releasing mute, and then search again.

During MP3/WMA file in disc or USB mode:

1)In TRACK SEARCH mode, the LCD will display TRK T 000 and flash the biggest digit 0 that the USBstick contain. (if the number of tracks is less than 100 and more than 9, it will be TRK 00) Then rotate the VOL knob to select the number of the flashing digit from 0 ~ 9. Then press SEL button to confirm the number and flash next smaller digit 0.

With the same means, select the number of the flashing digit. After finishing selecting the number of all flashing digit, press SEL button to play the track of the selected serial number.

2)In FIRST CHARACTER SEARCH mode, the LCD will display A--......, If there are files names its first character are A , the ......is the first file name its first character is A by the order of A~Z and 0~9; otherwise, the ......is NONE. Then rotate the VOL knob to select file’s first character by the order of A~Z and 0~9. Finally press SEL button to play the selected file.

3)In DIRECTORY SEARCH mode, the LCD will display the root folder(if there is not the root folder, it will find a root folder named ROOT). Then rotate the VOL knob to select your desired folder and then press >> or << button to select your desired track in the folder.

Finally press SEL button to play the selected track.

14. ST/MO BUTTON

In FM mode, press the ST briefly to select stereo or mono sound mode.

15.CLK BUTTON

Press the CLK button briefly to display time for 5 seconds on the display, and then returns to its previous display unless the button is pressed again.

Then press the CLK button and hold for more than 1 second until the real time flashes on the display. Then you can adjust HOUR or MINUTE by rotate the VOL knob.

16.AUX INPUT JACK

Press the mode button to select auxiliary input playing mode. Then you can connect any matched external audio device to this socket. Use the volume knob to adjust volume.

17.USB SOCKET

In order to play the file in the USB stick, turn over the plastic cover cap then insert the USB stick into the USB socket. The system will change into the USB mode automatically, and then play the first file in the USB.

When no needing to do USB operation, please cover the plastic cover cap.

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18.RELEASE BUTTON

Press the REL button to release the front control panel from the unit chassis, then pull it up a little to remove from the unit chassis.

When the front control panel is removed the LED indicator flashes.

19.RESET BUTTON

Before operating the unit for the first time, or after replacing the car battery or changing the connections. You must reset the unit.

Press this button with a cuspidal object. This operation will erase the clock setting and some stored contents.

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