Using these adapters you can use the Vizaro Onyx or Vizaro Pearl frame with the Britax-Romer car seats that are Group 0 (not valid for Group 0-1 models).
Compatible models are as follows:
Britax Römer Baby Safe
Britax Römer Baby Safe i-size
Britax Römer Baby Safe 2 i-size
Paquete BABY-SAFE iSENSE