SKU: 49296820366
maxi cosi vs diono

maxi cosi vs diono DIONO Radian 3 RXT All-in-One Convertible Car Seat (2020 Edition)

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Description

maxi cosi vs diono DIONO Radian 3 RXT All-in-One Convertible Car Seat (2020 Edition)The Diono radian 3RXT is the original 3 across All in One convertible car seat, trusted by over a million parents to protect their child from birth to booster (5 120 lbs 2. 3 54 kg). Lovingly engineered with the famous Diono steel core and now rear facing for even longer. Expect 10 years of safety from just one car seat! DIONO Radian 3 RXT All in One Convertible Car Seat 2020 Features: Rear facing for longer Now up to 50lbs 22. 7 kg Improved Fabrics

The Diono radian® 3RXT is the original 3 across All-in-One convertible car seat, trusted by over a million parents to protect their child from birth to booster (5-120 lbs / 2.3-54 kg). Lovingly engineered with the famous Diono steel core and now rear-facing for even longer. Expect 10 years of safety from just one car seat!

DIONO Radian 3 RXT All-in-One Convertible Car Seat 2020 Features:

Rear-facing for longer

Now up to 50lbs / 22.7 kg

Improved Fabrics

New and updated fabrics that are easy to remove and wash.

Positioning Liner

New 2-in-1 infant positioning liner that is removable as child grows

Newborn Wedge

Integrated newborn travel high wedge creates near lie-flat travel position

 

Car Seat Installation:


Product Specs:

Rear-facing
5-50 lbs / 2.3-22.7 kg

Forward-facing
22-65 lbs / 10-29.5 kg

Booster mode
40-120 lbs / 18-54 kg

Seated torso height
7.5-16.5″ / 19-42 cm

Overall maximum height
up to 57″ / 144.8 cm

Weight
26.4 lbs / 11.97 kg

Care and Maintenance:

Cover machine washable at 86F/30C/Cold

DIONO Radian® 3RXT All-in-One Convertible Car Seat (2020 Edition)

Product Manual

Tips and Tricks:

Installation Tips

  • read the manual the comes with your car seat
  • read the vehicle manual
  • find a certified child passenger safety instructor or technician to help you and check your installations

 

Airline Use:

  • unfold the Diono car seat before boarding the plane and ask the flight attendant for seat belt extenders
  • make sure to install the car seat next to the window so passengers can get by in case of an emergency
  • make sure to take the slack out of the seat belt extender before connecting to the airplane seatbelt

Rear Facing Installation:

  • first secure the detachable base and slide in the locking mechanism
  • adjust the harness to be the proper height for rear facing
  • adjust the head support to fit your child properly

Folding and Unfolding:

  • to unfold: lay the car seat down on a stable flat surface and undo the velcro strap, tuck it in behind the fabric and open seat until clicked and locked.
  • to fold: remove the red velcro strap from behind the fabric and loosen up the harness as much as possible so they are at the top of the car seat. release the lever at the bottom of the car seat and push seat inward - secure the top with the red velcro strap.

 

Right For Newborn:

  • whether you buy an infant only car seat or an all-in-one convertible car seat, both car seats have to meet the same standard
  • seats like the Diono all-in-one convertible car seats come with an infant cushion insert to properly fit your child in the harness
  • all-in-one convertibles are more economical - they have a lot of room for growth for your growing child

FAQ's:

can the radian 3RXT fit 3-across in my car?

Most likely, yes, as long as you have 51” (129.6cm) in the back row from vehicle armrest to armrest. It may be necessary to install all three using the vehicle seat belt system.

can the harness straps be cleaned?

Yes, we recommend using a damp cloth with a solution of water and baking soda to wipe the straps clean. They cannot be saturated in any liquid, or they will need to be replaced. Replacement harness straps can be purchased on our website.

can I use the radian 3RXT from birth?

Yes, the weight limits on all our convertible car seats starts at 5lbs. The newborn must also meet a length requirement where the top of their shoulders reaches the lowest harness slot on the seat.

are the harness pads and buckle pads required on my seat?

Yes, they are required while your child is sitting in forward-facing. They are optional but recommended while sitting in rear-facing. The center buckle pad is required at all times.

See Entire Diono Collection

See Related Article: Best Car Seats of 2022

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 49296820366

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4.4 ★★★★★
Based on 27 reviews
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Product Reviews
K
Verified Purchase
K. Beyer
Cuba, US
★★★★★ 5
Very nice
Pretty good idea and great design. I couldnt belive it.. The price was reasonable and i thought its probably just a clicking clock type thing, so my hopes werent really up, but i figured i would give it a try, i was so amazed when i turned it on. It actually feels like the gentle thump of the heart beat. No clicking like a clock or anything you can imagine up. Im very impressed. My dog is adjusting to being blind so she wakes up scared and confused and cries till I can get to her and reassure her. I put this in her blanket with an small hand warmer and it has had a calming effect for her. She can feel the heart beat vibrate through her blanket and pillow and the low warmth of the hand warmer is comforting. The charge makes it through the night so if I go to the kitchen or do a chore she is comforted when I'm not close at hand. I'm ordering a second one so I can alternate them, one charging while one is in use. I can put this in her stroller and should I need to charge it it works off of the phone charger in my car or even the extra chargers we have available every where. Very well made, nothing that could break off and be swallowed by accident. Nothing that could stick her or injure her at all. Smooth to touch, button is level ,no way to dig it out or chew it loose. Nice to receive a well designed product that I can trust is safe for my babis. Cause yes.... we want the best for our pets. I give this my highest recommendation. If they had a number higher than 5. This little gem would deserve it. Only the best my jenny. 2nd purchase addendum: Awesome!!!!! I decide to give this gem a real work out. I charged it up and put it in Jenny's blanket and let it run.... 36 hours later it was still going strong. You can feel the lub dub heart beat on top, a foot away and 2 feet away. Jenny sleeps in bed with me so I felt all around it and could feel it through the blanket and into her pillow. Sometime she lays on top of it, sometimes she is beside it but she is always within it's range. I removed it to charge and she searched for it and couldn't settle and calm. So I ordered a second one. One is charging while the other is in use, i could feel the gentle heart beat through the mattress. It's not annoying, just a soothing heart beat she finds comfort with. I can place it in her carriage or in her travel carrier in the car. Fits in the palm of your hand, not bulky or uncomfortable. It lights up when it is charging and goes dark when the charge is complete. I took it with her when she went to the baby sitter (usually she is always with me) and she was comfortable the short time I was gone. Wouldn't be without this gem. It is well made and safe i give it a 10. Best thing you can get for your babis. You won't be disappointed. ❤️
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 3, 2024
Z
Verified Purchase
Z_Meggers
Los Angeles, US
★★★★★ 5
Good product.
Works well. Holds a good charge. Helped my puppy some. I put it in a blanket that smelled like her family. Seemed to help her sleep better than. Some puppies in the past. Durable when she does get her teeth on it. Also a good size.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 8, 2025
A
Verified Purchase
Alan
San Leandro, US
★★★★★ 5
I use it for myself not my pet
I sewed a fluffy velcro pouch to put this in, and then I wrapped the pouch around a microwavable heat gel pack in order to get the sensation of both heat and heartbeat while hugging a large stuffed animal. It works great. It's not too loud if you position it right. It helps me to fall asleep and not feel lonely or touch starved. The battery lasts a long time and I don't have to recharge it very often. I only wish that the speed of the heartbeat was adjustable so that I could slow it down a little more so that my own heartbeat might try to match it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 7, 2024
M
Verified Purchase
Mary S.
Boise, US
★★★★★ 1
Easily Exposed Lithium Ion Battery
I am returning this item for my money back. Apparently, they think they can charge $16 for a piece of plastic and not even put a screw on the back to hold the panel closed. My dog is smart and a little rough when anxious. I wanted a rechargeable heart (to avoid buying batteries) to help with this anxiety but cannot risk the Velcro coming undone and him biting the heart by mistake. The panel slides off very easily. There's a reason that lithium ion batteries aren't usually easily accessible. I'm not risking my dog discovering a battery and wire in the heart. Even with appropriate supervision, accidents happen. I don't even understand why I would need to access the battery when it's rechargeable. I don't recommend purchasing this product for that reason alone.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 17, 2022
M
Verified Purchase
Marilyn
Port Orchard, US
★★★★★ 4
Works great!
It works great, don't have to buy batteries. 07/-8/25 Marilyn A.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 9, 2025

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