It’s called AF400 PRO ED and is the ultrasonic antifouling model that Citadel created as an evolution of the previous AF300 series.

The most significant changes concern both the control box and the transducers. In fact, for the first two versions have been created, one of which with an additional status indicator for each transmission channel. The transducers, on the other hand, have a more powerful output that reaches 60 Watts and the possibility of connecting cables up to 60 m long against the maximum 30 of the AF300 series.