Signstek FF-003 Portable Fish Finder FishFinder Outdoor Fishing Tool Sonar Sensor Boat Fish
http://www.amazon.com/gp/product/B00C95IUSI?tag=sukses2015-20
100-level sensitivity setting and multi levels depth range
512 colors TFT V240H160 sunlight readable with white LED frontlight
Depth reading from 20 to 240ft in 110th precision
Bottom contour and water temperature indicator
Easy to operate Simply turn the power on and cast the sonar sensor from the bank rock bridge or boat