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 1Adopt the design of waterproof gasket to make the sonar sensor float on the water. 2Using the visual display, you can clearly read the depth of the fish, which is useful for you. 3The sensitivity setting is adjustable, which can distinguish between big fish and small fish. 4With the alarm design for intelligently identifying fish, it is really convenient and helpful for fishing. 5Because of its lightweight, compact, it is easy and safe for user to carry and store. 1 x Fish Finder 1 x Hand Strap 1 x Sensor (with Wire) 1 x Bracket 1 x Fixing Screw 1 x User Manual