This seat is a four years old, I cannot attest to it safety but it is a high quality seat and seems to be in good working order. It can be converted into a booster seat.
I checked the Department of Transportation's recall list and I didn't this model number listed. See here: https://www.nhtsa.gov/recalls?carseat=diono
Here is a video about how long you can use Diono car seats - it is good for 10 years, or until 2029. Here is a video from the company discussing the expiration dates: https://www.facebook.com/reel/557911043012215
This seat has never been in an accident.
Below is description of the seat from Google:
Key Features and Specifications:
Diono Radian 3RXT All-in-One Convertible Car Seat
Age/Weight Range: The seat is designed to grow with a child through four stages:
Rear-facing: 4 to 50 lbs (up to 44.1 inches height)
Forward-facing (5-point harness): 22 to 65 lbs (up to 57.1 inches height)
Booster: 40 to 120 lbs
Safety Features:
Steel Reinforced Frame: Mechanically engineered with a reinforced automotive-grade high-strength steel core for protection.
Side Impact Protection: Features 6 to 8 layers of enhanced side impact protection with energy-absorbing EPS foam.
Anti-Rebound Bar (ARB): Includes a steel anti-rebound bar to reduce rebound rotation by up to 50% in a crash when rear-facing (on some 'SafePlus' versions).
Convenience and Fit:
3-Across Fit: Famous slim-fit design allows three Radian seats to fit in most family-sized vehicles.
FAA Approved: Certified for air travel, and it folds flat for compact storage or travel.
Adjustability: Features a one-hand easy-adjust 12-position headrest.
Maintenance: Has a removable, machine-washable cover.