CARACTERISTICAS Display Options: Auto ranging, 2X and 4X auto and manual zoom, 3 Fish Symbol™ sizes, adjustment bar Alarms: Deep water alarm, shallow water alarm, 3 size fish alarm, battery low alarm Transducer Auto-Sense: Automatically displays speed and temperature data without menus See-Thru™ Technology: Shows weak and strong returns simultaneously Depth Control Gain (DCG™): Automatically adjusts fishfinder sensitivity according to depth Power Down Setting Backup: Customer setting is not lost when unit is turned off Case: Fully gasketed, high-impact plastic alloy Keys: Backlighted Temp. Range: 5°F to 158°F (-15°C to 70°C) Waterproof: Submerged to 1 meter for 30 minutes Specifications are subject to change without notice. * Depth capacity is dependent on water salinity, bottom type, and other water conditions.