Hull Mount; 7 Pin; 83/ 200 kHz Dual Beam Frequency, 455/ 800 kHz, 1.2 MHz Operating Frequency; 20/ 60/ 86/ 55 Dual Beam Angle; 30 Feet Cable; With Built In Temperature Sensor; 1 Inch Diameter Transducer Shaft; Mega Down Imaging; Plastic Thru-Hull With Fairing Block; Compatible With HELIX 12/ 10/ 9 CHIRP SI GPS G2N To The Maximum Capability Of The Unit. HELIX 12/ 10/ 9/ 8 CHIRP MEGA SI+ GPS G3N And HELIX 15/ 12/ 10/ 9/ 8 CHIRP MEGA SI+ GPS G4N To The Maximum Capability Of The Transducer