Item Type: Depth Sounder_x005f_x000D_Material: Stainless steel 316L, anti fog glass, ABS_x005f_x000D_Mounting Hole Diameter: Approx. 52mm/2in_x005f_x000D_Depth Indication Range: 0-100m/0-328FT_x005f_x000D_Backlight Color: White_x005f_x000D_Operating Voltage: Dc 12V_x005f_x000D_Instantaneous Voltage: Dc 9-32V, up to 16v_x005f_x000D_Operating Current: 60mA_x005f_x000D_Operating Temperature: -30 C- + 75 C_x005f_x000D_Storage Temperature: -40 C - + 85 C_x005f_x000D_Dial Waterproof Rating: IP67_x005f_x000D_Back Cover Waterproof Rating: IP5_x005f_x000D_Operation:_x005f_x000D__x005f_x000D_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_x005f_x000D_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._x005f_x000D__x005f_x000D_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 setting range :0.6-19.9_x005f_x000D__x005f_x000D_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):_x005f_x000D__x005f_x000D_Range: 1). Unit''M'': 0-6.0 2). Unit''Ft'':0-19.9 3). Unit''F'':0-3.3