Features 1、1. LED backlight receiver, allowing you to read the screen information at night, backlight brightness can be adjusted according to needs. 2、 2. It can accurately detect the position of the fish, the depth of the water, the contour of the bottom, the water temperature, and the clear fish icon is displayed. 3、 3. Measuring depth up to 45 meters, wireless receiver range of 100 meters, sonar frequency 125KHZ. 4、 4. Help you detect fish more accurately and adapt to different environments. 5、 5. With fish intelligence device, depth alarm settings, screen brightness settings, receiver screen refresh rate settings, depth range settings. The product specification: 1. Display Display: Dot for Matrix LCD Display Size: 50x45mm DisplayDot Number: 128*96 DisplayContrast: 10~100% Backlight: White LED Backlight 2. 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℃ 3. Power Supply: Mainframe : Lithium battery 3.7V Transducer: Polymer battery 3.7V Package List Display *1 Sensor probe*1 Antenna *1 USB charging cable*1 Lanyard*1 Instruction manual*1