B75M 600W Medium Frequency CHIRP Transducer 20degrees Tilt Single Operation Cable for 1 Transducer Install. The B75’s offer high resolution benefits of CHIRP technology at an affordable price. Available in a number of low-profile, tilted element configurations these transducers are great options for small and medium sized trailerable boats. They also offer wider beam angles than some more expensive transducers, providing greater coverage below the vessel.. Specifications: Beam: 24 to 16 Degrees Medium-Frequency. Deadrise Angle: 16 to 24 Degree. Frequency: 80-130 kHz Medium Frequency CHIRP. Material: Bronze. Maximum Depth: 900′. Sonar: CHIRP Sonar, Depth and Temperature. Type: Thru-Hull.