Features 1.1. Fishfinder and depth finder: This is a portable fish finder that can display the approximate fish location and water depth. The sonar sensor can be installed on the hull of a kayak or small boat so that you can understand changes in water depth as you pass by. The water depth detection range is between 2.3 feet (0.7 meters) and 328 feet (100 meters). 2.2. Colorful data display: In addition to fish depth and water depth, the handheld fish finder will also display short and tall weeds, sand and rocks at the bottom. At the same time, the measurement unit of depth can be switched freely by feet or meters. With color backlight, the display can be clearly seen in the sun or in the dark. It has 5 settings to choose from; power-saving mode; backlight mode; fish alarm; unit of measurement. The settings can be saved when closed. 3.3. Portable handheld: The fish finder has a small size and is convenient for one-handed control. Throw the fish finder sensor into the water and turn on the display unit. When the fish or school of fish pass by, you will receive an alert. You can fish in clear water or muddy water. 4.4. Gifts for fishing enthusiasts: Whether in freshwater or in seawater, you can easily use the depth finder for boat fishing, ice fishing, and sea fishing. If you are looking for gifts for your husband, father, friends, or any angler, look no further, fish finder is now better than ever. 5.5. Detailed parameters: The fish finder uses sonar to detect the depth of the water and the position of the fish. The sonar frequency is 200 kHz. The detectable area is the 45-degree beam angle below the sonar transducer. The fish finder requires 4 AAA batteries (not included). Specification Material: ABS + electronic components Color: yellow Product size: 13*8cm Display size: 7*4.2cm Probe cable length: 7m Power supply: 4*AAA batteries (not included) Detection depth: 0.7-100m Detection frequency: 433.92MHz Sonar frequency: 200KHz Sonar detection angle: 45° Package List 1*Fish Finder 1*Probe 1*Instruction