Radian® 3R Manual - English January 24, 2023 17:46 Updated Radian3R_Manual_EN_V2.pdf 10 MB Download Related articles Radian RXT (Manufactured as of May 2016) Radian® 3QX Manual - English How much space is needed for rear-facing Radian® R Series? Can I install the Radian 3RX with the LATCH (UAS) and vehicle seat belt? When does my Diono car seat expire? What is my seat's expiration date? Comments 0 comments Article is closed for comments.