Optional High Speed Transom Mount Transducer 600 Watt Optional High Speed transom mount transducer with depth speed and temperature. Dual Frequency 200/50 KHz. (P66)Compatible with the following Echo Sounders:SL Series: SL755RC, SL760RC , SL1250, and SL1250RChsb2 Plus Series: L755RC, L760, L760RC, L1250,and L1250RChsb2 HDFI Series: DSM250, L770D, L770DRC, L1260D, and L1260DRCCompatible hull material: metal, wood and fiberglassMax Power: 600 WFrequency: 200/50 kHzBeam Angles: 200 kHz 11 50 kHz 45Features:30ft (10m) CableReplaceable paddle wheel assembly**requires E66066 adapter cable to go the Raymarine a,c,e,eS Series