ABOUT ME The Cybex Base M is compatible with the Aton M, Aton M i-Size and Sirona M2 i-Size car seats. Due to the individual adjustable ISOFIX connectors as well as the height-adjustable load leg, the two car seats gain extra stability and safety on the Base M. The one-click installation offers a safe and simple installation that requires no further fastening. Installation indicators also help to prevent a possible misuse. HIGHLIGHTS One-click installation Height adjustable load leg Adjustable ISOFIX connectors SIZE + FIT Compatible with the CYBEX Aton M, Aton M i-Size + Sirona M2 i-Size car seats