The wireless fish finder is portable and reliable for anglers to find the locatio of fishes This device features a frequency sonar system with LCD screen for powerful performance Allows you to instantly capture the fish without watching the float for a long time. Multi functional and practical fishing helper With this smart fish finder, you can easily get the information about the depth and condition of the sea, fish depth scale and water temperature, etc. Also can be used at night White LED backlight design for clear display at night Specifications: Depth range : 0.6m-45m Display: Dot Matrix LCD Display Size: 50x45mm Display Dot Number: 128*96 Display Contrast: 10~100% Backlight: White LED Backlight Sonar & Radio: Depth Range: 2-120Ft/0.6-45M Wireless Operating Range : 100m Sonar Frequency: 125KHZ Sonar Beam Angle: 90 degree Radio Frequency: 433.92 MHz Operational Temperature: -20 ~70℃ Power Supply: 4 * AAA Battery(Not included) Specifications: The wireless fish finder is portable and reliable for anglers to find the locatio of fishes This device features a frequency sonar system with LCD screen for powerful performance Allows you to instantly capture the fish without watching the float for a long time. Multi functional and practical fishing helper Also can be used at night White LED backlight design for clear display at night Package Included: 1* host, 1* probe, 1* charging line, 1* instruction 1* hang rope Notes: Due to the difference between different monitors, the pictures may not reflect the actual color of the item. Compare the detail sizes with yours, please allow 1-3cm error, due to manual measurement. Please leaving a message before you give the bad feedback, if the products have some problems. Thanks for your understandings.