To set the Depth Alarm: 1) Press Menu to enter into menu setting. 2) Repeatedly Press Menu to switch to ALARM menu. 3) Use the Up / Down Arrow to select Depth Alarm option. 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. Fish Alarm The Fishfinder sound an alarm tone when it detects what it determines to be a fish. To set the System Reset: 1) Press Menu to enter into menu setting 2) Repeatedly press Menu to switch to ALARM menu 3) Use the Up / Down Arrow to select Fish Alarm option. 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. Main Battery When using a 12~18v battery for powering, the Fishfinder sound an alarm tone when the battery strength of the sonar unit is lower then the setting. To set the Main Battery: 1) Press Menu to enter into menu setting. 2) Repeatedly press Menu to switch to ALARM menu. 3) Use the Up / Down Arrow to select Main Battery option.
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