Display water temperature and depth, fish depth and location, weed detector, bottom contour detector, sensitivity, and battery strength. Audio fish alarm alerts you when fish have been found. Backlight LCD for clear reading even when fishing at night or in overcast weather. Suitable for fishing at and on ice. Depth readout from 0.6 to 100m Style: Portable Display: TN / Anti-UV LCD Backlighting: White LED Powered By: 4 x AAA batteries (not included) Sensor Beam Angle: 45 degrees Depth Range Maximum: 328 feet (100 meters) Depth Range Minimum: 2 feet (0.6 meters) Investigation Depth (m): 0.6m - 100m Operational Temperature: -20-70℃ Max Depth : 100m / 328ft Sturdy and water- design, and convenient. Compact portable unit fit easily into your pocket or tackle box. Can be used in ocean, river, and lake, it shows the grass, rock, sand in the sea. Color:As Shown Material:ABS Package Contents: 1Set * Smart Fish Finder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.