Furuno Smart Sensor DT-800MSF - Thru-Hull Transducer [DT-800MSF]Furuno DT 800MSF Airmar B617V Housing Style Transducer Designed with Airmar's exclusive Broadband Ceramic Technology, the DT 800MSF's 235 kHz element improves resolution without sacrificing sensitivity. The higher power rating 100W RMS provides spot on depth readings in as little as 0. 45M (1. 4') of water and can reach depths up to 180M (600') Standard Features: Depth and temperature in one compact bronze housing Fast response temperature sensor