PRODUCT SPECIFICATION: 1) Display: 3.5inch MVA-TFT-LCD 2) Back lighting: On/off White LED 3) Depth Capability: 328feet(100m) 4) Sonar Coverage:45degrees beam angle in 200Khz 5) Wireless operational Range: 980feet(300m) 6) Power Requirement: 11 to 13V DC 7) Water depth,water temperature, fish location, bottom contour can be constantly obtained from the water 8) User selectable sensitivity,zoom,units,depth range,shallow alarm,fish icon,fish alarm,and chart speed setting 9) Built in memory stores sonar setting when the fish finder is turned off 10) Operational Temperature: 14°F to 122°F(-10°C to 50°C) Power Source: DC 10V-18V Language: English Sonar Frequency: Wireless: 125Khz Detecting Range: 0.6-183 Meter Sonar Coverage: 90 degrees in 125Khz Power Input: DC 10-18V Wireless depth capability: 328feet(100m) Wireless operating range: Up to 980 feet (300m) Display: 918-CWLS:3.5inch, 918-WLS:3.9inch Power Requirement: 11 to 13V DC Sonar Coverage: 45 degrees beam angle in 200Khz