The Sitex SST-110 Sea Surface Temperature Gauge provides precision temperatures to 0.01 degree resolution. The SST-110 is also easy to calibrate, has temperature alarms and trend indicators.The SST-110TS is packaged with a Bronze Thru-Hull Transducer with a 30' cable for boats that do not want a transducer mounted to the transom. Display Dimensions: 4.3" x 4.3"