LUCKY Portable Professional Sounder Wireless Sonar Fish Finder Fishing Probe Detector Fishfinder with Dot Matrix   This wireless sonar fishfinder adopts the latest advanced sonar detection technology to display live update of the water bottom contour and scan a large area in just a few minutes. It can be used in ocean, rivers, lakes, ponds, reservoirs, etc. Features:  Wide and clear dot matrix LCD display. Depth readout ranges from 2.0~135ft and display bottom changing contour. High / low sensitivity setting, audible alarm of fish and water depth. 150m / 500ft wireless operating range. Wireless sensor with 90 degree beam angle. Water temperature and battery indicator. Rechargeable wireless sonar. Can be used as a depth sounder. Adjustable sonar sensitivity setting. With simulation mode. 100% waterproof floating sensor. 3 languages for choice: English, German, Russian. Detects both fish location and depth in both fresh and salt water. Fish icon and live-update water bottom contour (grass, sand and rock) in the sea. With alarm and adjustable chart speed, sensitivity level setting, depth range setting. Specification: - Host Display: Adjustable high contrast dot matrix FSTN LCD 128V x 64H Display Size: 41 * 48 mm (1.61" * 1.89") Back Light: ON / OFF white LED Zoom: OFF / 5m / 10m/ 20m / 30m / 45m Depth Alarm: OFF / 5m / 10m / 20m / 30m / 45m Sensitivity: 5 levels Chart Speed: 4 levels Power Requirement: 4 x AAA battery (not included) Depth Unit: Ft/m Temperature Unit: ℃ / ℉ Bottom Contour: Show true changing of water bottom contour Memory: Built-in memory stores sonar setting when the unit is turned off Waterproof Rating: IPX4 (Spray waterproof) Language: English, German, Russian Operating Temperature: -10~+50℃ Storage Temperature: -20 ~+70℃ Size: 122 * 75 * 31mm / 4.8 * 3.0 * 1.2in - Sensor Depth Range Max / Min: 45m / 0.7m (147.6ft / 2ft)  Wireless Operating Range: 150m / 500ft  Coverage: 90 degrees beam angle in 125Khz  Power: 1 * 3.7V rechargeable Lithium battery (included) Size: 80 * 60mm / 3.1 * 2.4in Weight: 70g / 2.45oz Package Size: 20.5 * 16.5 * 7.7cm / 7.28 * 6.50 * 2.24in Package Weight: 439g / 15.5oz Package List:  1 * Professional Dot Matrix Wireless Fish Finder 1 * Wireless Remote Sonar Sensor 1 * DC Adaptor 1 * Charging Cable 1 * User Manual (English) 1 * User Manual (Russian)