Specifications: Features 200khz sonar frequency Polarized LCD display for depth and units of measure reading Selectable units of measure in English and metric Depth reading from 2.0ft to 200ft(0.8 to 60.9 meters) Instant depth readings in the nearest 1/10 foot or meter Soft glow low intensity LED backlight Water resistant design DC 12v power,200ma max. Depth alarm(3-200) Transducer type: Combination transom/glue in(in-hull) Operation temperature -20--60 degress c