Feature: 1. Smart Sonar Detection: With a 45° detection angle, the maximum depth can reach 100m, and the frequency can reach 200kHz. It can be connected to a kayak or a fishing rod to get the changes in water depth and the situation of fish schools. 2. Clear Digital Display: The handheld sonar detector is equipped with a high-clear digital display screen with 10 sensitivities, which can clearly distinguish the detected fish, stones, water plants, etc., and display them on the handheld screen. 3. Fish School Detection Alarm: After placing the detector underwater, set the fish school alarm. When a school of fish passes by, a slight alarm prompt will be issued, and the sensor refresh time can be set to provide you with the fastest sensing time. 4. Powerful Functions: The fish finder has a 10-level backlight effect, and the detection effect can be clearly viewed in the daytime or in the dark. It can meet different fishing methods, such as ice fishing, river fishing, sea fishing, kayak fishing, etc. 5. Portable And Handheld Design: This fish finder can be used as a handheld, and a hand rope is configured in the package, which can be wrapped around the hand to stop it from falling and can also be hung around the neck for carrying. Specification: Model: XF-03 Structure: ABS Color: Black Sonar frequency: 200kHz Detection angle: 45° Detection depth: maximum 100 meters Power: 4*AAA batteries (not included) Detection frequency: 433.92MHz Item Size: 13 * 8 * 3cm/5.12 * 3.15 * 1.18in Item Weight: 153g/5.4oz Package Size: 15 * 9.5 * 9cm/5.91 * 3.74 * 3.54in Package Weight: 510g/17.99oz Package List: 1*Handheld Display Screen 1*Sensor 1*Lanyard 1*Bracket 1*Screw 1*User Manual