B45-DT-HB 600W Thru-Hull Transducer w/Fairing Block & Humminbird #9 ConnectorThe B45 is our smallest and most economical, dual-frequency, bronze, stem transducer. Its streamlined shape and High Performance fairing block deflects aerated water from the transducer's face for strong return echoes and clear display images. Features:Bronze housingDepth and TemperatureRecommended for planing-hull powerboats and cruising sailboats up to 9 m (30')Good sensitivity in a compact housingFast-response water-temperature sensor provides A 0.2AdegC (A 0.1AdegF)High-Performance Fairing includedUsable Shaft Length: 92 mm (3.62")Standard fairing block Frequency: 50/200 kHzMaximum Depth Range:50 kHz-235 m to 353 m (800' to 1,200')200 kHz-118 m to 206 m (400' to 700')Cone: 50 kHz-45Adeg, 200 kHz-12AdegRMS Power: 600 W