The R409LM-W Ultra Wide Beam CHIRP Depth and Temperature Through Hull Urethane Transducer. Compatible hull material: metal, fiberglass and wood. Max Power: 2000 watts. Frequency: Low 40-60 kHz and Medium 80-130 Khz Beamwidth: Low constant 40 degrees, Medium 8-13 degrees. Cable: 30ft (9.1m) cable with connector for connection to CP450C, CP470 and CP570.