Signstek FF-011 Wireless Fish Finder FishFinder With Round Sonar Sensor White LED Backlight http://www.amazon.com/gp/product/B00CK2KVWS?tag=sukses2015-20 Bottom contour and water temperature indicator Fish symbol and fish depth indicator User selectable depth range and zoom onoff User selectable feet for meter reading Depth reading from 20 to 100ft in 110th precision 5-level sensitivity setting 125Khz sonar frequency Battery in sonar can be replaced Audible fish and depth alarm 399ft
