Garmin AIRMAR DT800 Smart Sensor, thru-hull, Depth, Temp, 20deg tilted element, 20ft, NMEA 2000 Airmar Smartsensor D/T, 20 deg lo-profile, N2K 235KHz, 100 Watt depth sounder module w/ temp sensor DT800/P17 plastic low-profile thru-hull (2" shaft) with 20 deg tilted element NMEA 2000 data output w/ 20' cable