The joie belted car seat base is compatible with the joie gemm and juva car seats features group 0 birth to 13kg compatible with the joie gemm and juva car seats installed using the vehicles 3 point seat belt colour indicators confirm base is fitted correctly giving you peace of mind belt tensioner to ensure extra firm installation when using vehicles seat belt support leg provides ultimate stability security and easily adjusts for the best fit dimensions dimensions 58 x 32 x 58 5cm