Depth Sounder Waterproof Dash Depth Finder Transducer with White Backlight for Yachts Boats Item Type: Depth SounderMaterial: Stainless steel 316L, anti fog glass, ABS Mounting Hole Diameter: Approx. Φ52mm/2in Depth Indication Range: 0-100m/0-328FT Backlight Color: White Operating Voltage: DC 12V Instantaneous Voltage: DC 9-32V, up to 16v Operating Current: 60mA Operating Temperature: -30 °C- + 75 °C Storage Temperature: -40 °C - + 85 °C Dial Waterproof Rating: IP67Back Cover Waterproof Rating: IP5Operation: A. This device is work with 12V system only, to indicate the depth appointed. Normally, the buzzer beeps once when it was connected correctly then turn on the power B. Keypad''Mode'': Quick press the keypad''Mode'' to switch SH/DP/KL/ UN Hold the keypad''Mode'' to turn on/off the monitor Short press the keypad''▲''''▼''to set the value required Hold the keypad''▲''''▼''to keep the digital increasing/decreasing fluently. Parameter: SH: (Low level alarm) Range: 0-0.6-19.9, when the level no more than value(SH) appointed,the symbol flickering and the buzzer beeps all the time. If SH=0 -->No alarm Alarm setting range :0.6-19.9 Range: 1). Unit''M'': 0-99 2). Unit''FT'':0-199 3). Unit''F'': 0-49 If the level exceed the a ppointed value , the buzzer will beeps twice Keel offset (KL): Range: 1). Unit''M'': 0-6.0 2). Unit''FT'':0-19.9 3). Unit''F'':0-3.3