4) Press Ent to enter into setting. 5) Use the Up / Down Arrow to change the value. 6) Press Ent to confirm and exit the setting. Note: once triggered, an alarm message will appear on the screen. The alarm will repeatedly appear unless the voltage of the battery is higher than the Battery Alarm setting. You can manually choose exiting the alarm mode by entering into Main Battery Alarm menu setting, and just changing the setting to a safe value will be ok. 4. System Beeper Beeper is used to determine whether the fishfinder will sound a tone when a key is pressed. To set the Beeper: 1) Press Menu to enter into menu setting. 2) Repeatedly press Menu to switch to SYSTEM menu. 3) Use the Up / Down Arrow to select Boat Battery option. 4) Press Ent to enter into setting. 5) Use the Up / Down Arrow to select the option. 6) Press Ent to confirm the setting. 7) Press Exit to exit the setting.
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