Norcross Hawkeye H22PX Sonar System Instant Depth Readings From 2.5 to 200FT (.8 to 61M) &amp; waterproof to 200FT (61M) Air and Water Temperature readings to the nearest 1/10th of a Degree F or C Fish Indicator Uncovers Hiding Fish. Polorized LCD with Softglow backlight for Easy Nighttime Viewing Shoot-Thru Technology Allows readings Through Ice or Boat Hulls 2 Year Warranty