Description This wireless sonar uses the latest advanced sonar detection technology to display a live update of the bottom contour and scan a large area in just a few minutes. It can be used in oceans, rivers, lakes, ponds, reservoirs, etc. Functions: The depth reading ranges from 2,0-135 feet and displays the changing contour of the bottom. High/low sensitivity setting, fish and water depth audible alarm. Wireless operating range 150 m / 500 ft. Wireless sensor with 90 degree beam angle. Water and battery temperature indicator. Battery wireless sonar. Can be used as a deep-sea probe. Adjustable sonar sensitivity setting. In simulation mode. waterproof floating sensor. 3 languages to choose from: English, German, Russian. Detects the location and depth of fish in both fresh and salt water. Fish icon and live update of the contour of the bottom of the water (grass, sand and rock) in the sea. With alarm and adjustable paper speed, sensitivity level setting, depth range setting. Specification: - Host Display: Adjustable high contrast FSTN LCD 128V x 64H dot matrix Display Size: 41 x 48mm (1,61" x 1,89") Backlight: ON/OFF white LED Zoom: OFF / 5m / 10m / 20m / 30m / 45m Depth alarm: off / 5 m / 10 m / 20 m / 30 m / 45 m Sensitivity: 5 levels Chart Speed: 4 Levels Depth Unit: Feet/m Temperature Unit: ℃ / ℉ Bottom contour: Show real change of water bottom contour Memory: Built-in memory stores sonar settings when the device is off Waterproof: IPX4 (spray water resistance) Language: English, German, Russian Operating temperature: -10-50℃ Storage temperature: -20-70℃ Size: 122 x 75 x 31 mm / 4,8 x 3,0 x 1,2 inch - Sensor Depth range Max. / Min.: 45 m / 0,7 m (147,6 feet / 2 feet) Wireless operating range: 150m/500ft Coverage: 90 degree beam angle at 125Khz Power: 1 x 3.7V Lithium battery (included) Size: 80 x 60mm/3,1 x 2,4inch Weight: 70g/2.45 oz Package Weight: 439g/15,5oz List of packages: 1 x Professional Wireless Spot Matrix Fish Detector 1 x wireless remote sonar sensor; 1 x DC adapter 1 x charging cable 1 x User Manual (English) 1 x User Manual (Russian)