Fish Finder Wireless Sonar Underwater Visible HD Fishing Detector

1) Display: 2.2inch high-contrast Dot matrix FS LCD, pixels:128Vx64H 2)Back lighting: On/off White LED 3) Depth Capability: 135feet(45m) 4) Wireless Sonar: 90 degrees beam angle in 125Khz 5) Power Requirement: 4xAAA alkae batteries(not included) 6) Waterproof design: level-4 (spray-water-proof) 7) Water depth, water temperature, fish location, bottom contour can be constantly obtained from the water 8) User selectable sensitivity, zoom,units, depth range,shallow alarm,fish icon,fish alarm,and chart speed setting 9) Built in memory stores sonar setting when the fish finder is turned off 10) Wireless Sensor could shut down when it is out of the water 11) Operational Temperature: 14°F to 122°F(-10°C to 50°C)