Radian® SafePlus® Series Rear-facing Base is only compatible with the following Radian® SafePlus® All-in-One convertible car seat models:
![Radian® 3QX all-in-one convertible car seat [Purple Plum]](https://cdn11.bigcommerce.com/s-nnd2r2nrxo/images/stencil/350x350/products/245/4797/3QX_Plum__33712.1733852941.png?c=1 "Radian® 3QX all-in-one convertible car seat [Purple Plum]")
3-stage newborn safety & 3-across: the advanced all-in-one convertible
![Radian® 3QXT All-in-one convertible car seat [Red Cherry]](https://cdn11.bigcommerce.com/s-nnd2r2nrxo/images/stencil/350x350/products/246/3197/3QXT_Red__80941.1723674399.png?c=1 "Radian® 3QXT All-in-one convertible car seat [Red Cherry]")
4-stage newborn safety & 3-across: the advanced all-in-one convertible
![Radian® 3R® SafePlus® all-in-one convertible car seat [Blue Surge]](https://cdn11.bigcommerce.com/s-nnd2r2nrxo/images/stencil/350x350/products/449/10865/50632-NA-01__07611.1731442308.png?c=1 "Radian® 3R® SafePlus® all-in-one convertible car seat [Blue Surge]")
The original 3 Across All-In-One™ convertible car seat with SafePlus® engineering
![Radian® 3RXT® SafePlus® all-in-one convertible car seat [Black Jet]](https://cdn11.bigcommerce.com/s-nnd2r2nrxo/images/stencil/350x350/products/352/8360/50100_Cutout__09400.1732206141.png?c=1 "Radian® 3RXT® SafePlus® all-in-one convertible car seat [Black Jet]")
Our best selling 3 Across All-In-One™ convertible car seat with SafePlus® engineering
![[Black Storm]](https://cdn11.bigcommerce.com/s-nnd2r2nrxo/images/stencil/350x350/products/500/15218/50150-NA-01__54551.1725977871.png?c=1 "[Black Storm]")
Our best-selling car seat, now with improved safety features
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