HawkEye DT1B DepthTrax 1B Combination Transom Mount / Glue-In-Hull Transducer Gives precise depth readings (in feet or meters) from 2.5 to 200 feet at speeds up to 63 miles per hour Incorporates an advanced three-stage depth alarm warning system with programmable shallow and deep water alarms; "Keel-Offset" function allows readings to be adjusted for vessel draft Easy touch, algorithmic, digital programming; waterproof front face, and large, , illuminated display Display dimensions: 1.65 x 0.85 inches (WxH); comes with a two year warranty