Feature:1. [Sonic Fish Finder] Using intelligent sonar fish finding technology, built in high quality chips, stable performance, accurate detection, and quickly improve the efficiency of fishing spots.2. [TFT LCD Display] Equipped with TFT LCD display, with white LED backlight, it can detect and display the underwater contour, water depth and fish body size along with the depth.3. [Signal Stability] The wireless host connects and receives, the signal is stable, and the depth range is 2‑148Ft/0.6‑36M, suitable for outdoor ice fishing, river fishing, sea fishing, etc.4. [Main Unit Waterproof] The main unit has good water resistance, does not sink, is scratch‑resistant, and there is no need to worry about water damage. The probe detection schematic diagram provides accurate detection.5. [Necessary For Fishing] The fish finder uses sonar to detect the depth of the water and the position of the fish. The sonar frequency is 125KHZ and the sonar beam angle is 90°.How to Use:Method 1: Connect the fishing line and use itMethod 2: Use with a remote control boat, send the wireless sensor to the appointment point, tie the sensor buoy and the bait to the end of the fishing rod and drop it into the water. When the sensor enters the water, it will use the conductivity of the water, turn on the switch of the sensor, and you can start fishi