Garmin Fishfinder 160 4.6-Inch Waterproof Fishfinder 200 kHz sounder with temperature sensor 3.3-by-3.3-inch screen with 4-level blue/green display; split-screen zoom Maximum depth of 900 feet Sonar power output of 400 W (RMS) and 3200 W (peak to peak) Protective front cover; waterproof and easy to install