Features: 1.Adopt the design of waterproof gasket to make the sonar sensor float on the water. 2.Using the visual display, you can clearly read the depth of the fish, which is useful for you. 3.The sensitivity setting is adjustable, which can distinguish between big fish and small fish. 4.With the alarm design for intelligently identifying fish, it is really convenient and helpful for fishing. 5.Because of its lightweight, compact, it is easy and safe for user to carry and store. Specification: Item Type: Fish Finder_x000D_ Material: ABS_x000D_ Display: TN/ANTI-UV LCD_x000D_ Back Lighting: White LED_x000D_ Depth Capability: Approx.328ft/100m_x000D_ Power Requirement: 4 x AAA alkaline batteries(not included) _x000D_ Waterproof Design: 4 levels (spray-water-proof) _x000D_ Show: Water depth, fish location, and bottom grass & rock _x000D_ User Selectable: Sensitivity, depth units, and fish alarm setting _x000D_ Operational Temperature: -4 to 158(-20 to70)_x000D_ How to Use: Connect the sensor to the display instrument, and then throw the sensor into the target PackageList: 1 x Fish Finder 1 x Hand Strap 1 x Sensor (with Wire) 1 x Bracket 1 x Fixing Screw 1 x User Manual