Works where no other depth finder can, and is now 60 percent more powerful. Shoot through muddy water to find water depth, drop-offs or ledges, or pinpoint hiding fish up to 200 feet away. Take it diving, snorkeling, crabbing or swimming; it is submersible up to 200 feet and it floats. Algorithmic programming virtually eliminates false readings, and the display updates four times per second for instant depth and temperature readings. No need to constantly watch the display for depth readings, because it flashes the last reading for five seconds after removal from the water. Shoot-thru technology allows readings through solid fiberglass hulls. Maximum Depth: 2 + ft to 199ft. Frequency: 200kHz (20° beam). Transmit Power: 200W (RMS). Display Type: Polarized LCD with Soft glow backlight. Screen Size: .93" W x .63" H. Battery Type: Four AA alkaline batteries (sold separately) . Battery Life: 10 hrs. continuous use. Dimensions: 2" W x 7" H x 2"D. Waterproof Rating: IPX8 submersible to 200 ft/floats. Two year warranty.