Sonar technology is using the propagation and reflection of sound to determine where is the object, as well as the distance and figure. The Foxnen Sonar Fish Finder is a use of this technology, which can detect and identify other object and the outline underwater. Sonar sensor sends a sound wave signal, will be reflected back after encountering the object. And wave reflection time basis to calculate its distance and position. It is fit for fishing enthusiasts and fishermen, or fishing in rivers, lakes, and other places. - Accurate digital temperature sensor up to 0.1C: The use of high-precision digital temperature sensor, the temperature of the target area will be displayed on your phone or tablet. It would accurate to 0.1C -Waterproof IP66: You can throw it into the water for 1-meter depth and it is waterproof design. -Night fishing mode: The flash device can show itself when it is dark around. Specification Dimension: 65mm*62mm Weight: 90g External material : ABS+PC Sonar Type: multibeam straight scan Waterproof Level: IP66 Connection: BTL 4.0 Distance: 0-40m Sonar frequency: 125KHz-200KHz Sonar scanning angle: 80-90° Different mode: Distinguish with Large, Medium and tiny fish Underwater Type: Distinguish with sand, weed and stone Assisted detection function: Temperature and depth (up to 80m) Batteries: Lipo battery 3.7400mAh Working time: More than 6 hours Application: IOS system, Android Box content Smart fish finder Charging wire Certificate of approval User manual Portable packing box
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