Humminbird 4089301 ICE 597Ci HD Combo DualBeam Fishfinder and GPS with SD Card Slot Depth: 1000 ft DualBeam PLUS SONAR with SwitchFire Precision GPS and Humminbird UniMap Battery 12 VDC with carry case SD Card Slot designed for serious ice fishermen Extreme-temperature LCD technology reports the lake bottom, setting the flasher scale automatically