Feature: 1. Wide and clear LCD display, the water depth can be shown either in feet or meter. The fishing sonar sensor is with 25ft cable and removable transducer float. 2. With water‑resistant design the unit can be used in ocean, river or lake and is fantastic for detecting schools of fish in any particular area. 3. The portable detector range is in a 45° cone underwater.The detection of depth range is from 2ft (0.6m) to 328ft (100m) below fishing sonar transducer. 4. With multiple functions, such as battery save mode; backlight mode; fish and fish school alarm, selectable sensitivity, fish depth scale and water temperature indicator. 5. It can be used for off shore fishing, ice fishing, lake fishing, sea fishing and so on. You can also use handheld fish finder on the moving kayak with speed below 5mph. 6. Adopting fishes and bottom environments readout, it can detect and display water depth, approximate fish location, short and tall weeds, sand and rocks on bottom. 7. This product is designed for amateur and professional fishermen, to find out the location of fish, depth and bottom environments of water. Specification: Item Type: Fish Finder Material: ABSDisplay Type: TN / ANTI-UV LCD Display Size: Approx. 4.3 x 4cm / 1.7 x 1.6in Backlight: White LED Power Supply: 4 x AAA Alkaline Batteries (Not Include) Unit of Measurement: Feet / Meter Sensor Beam Angle: 45° Maximum Depth Range: Approx. 100M / 328Ft Minimum Depth Range: Approx. 0.6M / 2Ft Working Temperature: -10℃-70℃ How to Use: Install the battery, connect the sensor and fish finder, and throw the sensor into the target point.. Package List: 1 x Fish Finder1 x Hand Strap1 x Sensor (With Wire, Length 25Ft)1 x Bracket1 x Fixing Screw1 x Manual