Welcome to my store, Wish you have a great shopping experience here. We will keep updating new products, and there is definitely one for you. " 10 level of sensitivity. 11 level white LED backlight. Can set fish alarm, depth alarm, contrast, chart speed(10 grades), fish display, unit(depth: meter/feet; temperature: Celsius/Fahrenheit). Water bottom contours and structure are showed in the middle as well as water depth, fish size, and location, etc. Item Name: Fish Finder Material: ABS Display: 2.4" TFT LCD White LED Backlight Sonar Sensor Battery: 3.7V 1000mAh Lithium Battery(Included) Receiving Host Battery: 4 x AAA Batteries(Not Included) Continuous Usage Time: Up to 5 Hours Depth Range: 0.6-36M Water Temperature Sensor: Built-in Sonar Frequency: 125KHz Radio Frequency: 2.4GHz Sonar Beam Angle: 90 Degree Wireless Operating Range: 100m Operating Temperature: -10 to 70 Degree Celsius 2 Modes: Sonar Graphic Mode and Stationary Float Mode 6 Depth Range: 3, 6, 9, 18, 36, Auto Receiving Host Length: 12.5cm/4.92" (Approx.) Receiving Host Width: 6.3cm/2.48" (Approx.) Receiving Host Height: 2cm/0.79" (Approx.) Notes: You will find more amazing products if you visit our store. We guarantee the lowest price and the highest quality for all of our products! Due to differences in lighting and screen settings, the color of the project may be slightly different from the picture. Due to different manual measurements,allow for slight size differences. Package including: 1 x Wireless Receiving Host 1 x User Manual 1 x Sonar Sensor(with Lithium Battery) 1 x Charging Cable 1 x Lanyard