Long and heavy sensor cables take longer. It is equipped with a TFT LCD display (choose from 2 screen background colors - black and white), allowing you to read the screen in bright sunlight. Suitable for fishing environments such as lakes, rivers, and oceans. Ideal for fishing from kayaks, shore or fishing. It detects sand depth, water temperature, fish size (small/medium/large), fish depth and bottom profile. It has working and simulation modes. Convert unit measurements for depth and temperature. Sonar beam angle: 90 degrees. Depth Range: 2.6-131ft/0.8-40m. Maximum distance between sensor and screen: 262ft/80m. There is a drill on the hull for installing the sensors. The dual hole sensor allows you to attach the fishing line to the line and then lower it as far out of the water as possible. Note: 1. Please change the background from black to white bright sunlight for easy reading. 2. When the sensor is off, the battery meter display is incorrect. When charging, the light on the sensor will go down. If you want to check the sensor's battery status through the display, put the sensor in water. When it floats on the water, it opens. The sensor battery indicator will now display correctly on the monitor screen