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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-zoqnpughoc/images/stencil/350x350/products/170/1857/3QX_Plum__78804.1701481876.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® 3RXT® SafePlus™ all-in-one convertible car seat [Red Cherry]](https://cdn11.bigcommerce.com/s-zoqnpughoc/images/stencil/350x350/products/267/3989/50103_Cutout__86164.1705067758.png?c=1 "Radian® 3RXT® SafePlus™ all-in-one convertible car seat [Red Cherry]")
Our best selling 3 Across All-In-One™ convertible car seat with SafePlus™ engineering
![Radian® 3R® SafePlus™ all-in-one convertible car seat [Black Jet]](https://cdn11.bigcommerce.com/s-zoqnpughoc/images/stencil/350x350/products/295/5040/50630-NA-01__68694.1706873952.png?c=1 "Radian® 3R® SafePlus™ all-in-one convertible car seat [Black Jet]")
The original 3 Across All-In-One™ convertible car seat with SafePlus™ engineering
![Radian® 3QXT next generation of all in-one-convertible car seat [Purple Plum]](https://cdn11.bigcommerce.com/s-zoqnpughoc/images/stencil/350x350/products/171/1851/3QXT_Plum__58302.1705068668.png?c=1 "Radian® 3QXT next generation of all in-one-convertible car seat [Purple Plum]")
4-stage newborn safety & 3-across: the advanced all-in-one convertible
![New Diono Radian® 3QXT® FirstClass™ SafePlus™ All in One Luxury Convertible Car Seat, Suitable From Birth to Booster [Gray Slate]](https://cdn11.bigcommerce.com/s-zoqnpughoc/images/stencil/350x350/products/256/4526/53001-NA-01__77365.1704981970.png?c=1 "New Diono Radian® 3QXT® FirstClass™ SafePlus™ All in One Luxury Convertible Car Seat, Suitable From Birth to Booster [Gray Slate]")
FirstClass™ Comfort & Ultimate 3-across Safeplus Engineering
