[. . . ] The unit exhibits a marked change in performance or does not operate normally. Periods of Nonuse If the unit is to be left unused for an extended period of time, such asa month or longer, take out the battery from the unit to prevent damage or corrosion. Servicing The user should not attempt to service the unit beyond those methods described in the user's operating instructions. [. . . ] In case the unit is moved to different country with slightly different radio broadcast system, the unit allows you to select USA, Europe, Japan or Australia system. When the unit is in power-off mode, press the MODE button once and the display shows the blinking "USA" , "EU" (Europe), "JAP" (Japan) or "AUS" (Australia) area indicator. To automatically search for stations with strong signals, depress and hold the TUN + / - button until the frequency reading on the display begins to scan then release the button. During radio operation, if necessary you may press the MODE/ button to show the clock on display. NOTES : Use manual tuning to select weaker stations that might be bypassed during automatic tuning. If the automatic tuning does not stop on the exact frequency of the station, for example, it stops on 100. Listening to USB Flash Drive or SD/MMC card Music The unit has a built-in USB port and SD/MMC card connector for the connection of an USB Flash Drive and SD/MMC card. Wipe the unit with a soft cloth to remove any water drop , if the unit has been played in the water. To open the unit , grip the lower housing and turn it counterclockwise. Plug the USB flash drive into the USB connector or insert the SD/MMC card into the SD card slot. Before the USB drive /SD card connection, ensure that those memory devices are loaded with MP3 file. To close the unit, grip the lower housing and turn it clockwise until it locks tight with the upper housing. The unit detects the MP3 song / file stored in the device and play it automatically. You may press the TUN + / and TUN - / button to go to next / previous song (file). [. . . ] The reset operation clears the system memory and all of your previous settings will be erased. caution: DO NOT use a sharp , pointed object to press the RESET button. NOTE : If necessary, you may alter the Time Display Format again (see Clock Setting section in this manual) after the selection of the Region/Country. [. . . ]