Pupopan Bluetooth Fish Finder 48m/160ft Ice Fishing Sonar Sounder Portable English/Russian Language Fishfinder sonda de pesca Support Russian English Polish Spain and multi Language . Sonar & RadiSonar Frequency: 125KHZSonar Beam Angle: 90 degreeRadio Frequency: 2.4GOperational Temperature: -10 ~60℃2. Power Supply:Battery : Lithium battery 3.7VEndurance time:20H (Full battery)Sensor Working Theorem: the sensor working theorem is accordingwater conductivity Work process is as follows; 1) When the sensor is thrown to water, once the two pins touching water,the sensor will begin working. 2) When the sensor is dropped out from the water, you can dry theremained water from pin surface,the sensor will stop workingautomatically. The sonar sensor store:1) Do not place the sonar sensor in a wet area when not using,thedampness may cause the sensor to turn on itself automatically.The batterywill be depleted fast. Otherwise, avoid placing it on a metal board! 2) You should store it in a dry, nonmetal place! The place is far away fromany metal equipment. 3) Clean the surface with fresh water after use. Dry it before store it.

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