There are three models with a pump outlet from 100, 200 (2 x 100) and 400 (2 x 200) l/h, on which the smallest model has one and the two larger ones both have two individually adjustable air outlets.
They come equipped with one or two EHEIM defusors. The airflow can be regulated at each outlet on the pump and also on each diffusor. This allows you to set your own individual bubble effect. Eheim Product Number 3704110