Humminbird SmartCast RF30 1.25-Inch Water Resistant Fishfinder 1.25-inch high-visibility display with 48 x 32 pixels of resolution 75-foot remote operating range and 100-foot depth capability, in a wrist-mount design One-Touch menu navigation easily controls FishID+, depth range, fish alarm, and sensitivity Waterproof design with Wet Switch technology that saves battery life Includes one waterproof A-channel RSS unit with 400 hours of in-water usage time