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Emphasizes potential injury or death from not following instructions or product labels.
Checklist to ensure correct usage and installation of the car seat for safety.
Critical warning against rear-facing installation with active frontal airbags.
Prohibitions against misuse, modification, and use of unapproved accessories.
Guidance on replacing car seats after moderate or severe collisions in the US.
Guidance on replacing car seats after any collision in Canada.
Key components of the child restraint harness system for securing the child.
Parts and paths related to vehicle installation and securing the restraint.
Features for adjusting fit, comfort, and convenience.
Guidance on selecting the safest seating position and correct placement.
Critical warning against rear-facing installation with active frontal airbags.
List of vehicle belt types that CANNOT be used with this child restraint.
Explanation of the LATCH/UAS system for child restraint installation.
Warning regarding weight limits and prohibition of simultaneous use with seat belt.
Instructions for unfolding and folding the car seat for storage or use.
Steps for correctly placing and securing the child in the harness.
Guidance on proper harness strap height for forward-facing installation.
Guidance on selecting the correct buckle slot based on child's weight.
Steps for adjusting the headrest height for proper fit.
Overview of rear-facing use and routing the seat belt through the belt path.
Instructions for attaching and securing the detachable rear-facing base.
Guidelines on using the rear-facing base only for rear-facing installations.
Recommendation and steps for using the top tether in rear-facing mode.
Using infant support cushions for improved fit and comfort for newborns.
Warning about maximum weight for LATCH/UAS rear-facing installation.
Detailed steps for installing the car seat using LATCH/UAS.
Instructions for rear-facing installation using lap/shoulder belt.
Procedure for tightening the seat belt and testing installation tightness.
Procedure for tightening lap belt and testing installation tightness.
General forward-facing guidelines, age/weight limits, and belt path routing.
Guidelines on minimum age and weight for forward-facing use.
Instructions for forward-facing installation using LATCH/UAS for specific weight range.
Warning about maximum weight for LATCH/UAS forward-facing installation.
Instructions and warnings for using the adjustable bottom feature.
Instructions and guidelines for using the Safe Stop feature.
Steps for attaching and securing the top tether for forward-facing.
Detailed steps for installing the car seat using LATCH/UAS.
Detailed steps for installing the car seat using lap/shoulder belt.
Procedure for tightening seat belt and testing installation tightness.
Procedure for tightening the top tether strap and testing tightness.
Restriction for lap belt cushion use, only for US installations.
Mandatory use of the 5th harness slot when using the lap belt cushion.
Requirement to install Lap Belt Cushion for specific US installations.
Key warnings and guidelines for using booster mode, including belt type and retraction.
Instruction to remove the 5-point harness before booster mode use.
Detailed steps for installing the child in booster mode using the vehicle seat belt.
Important note on correct shoulder belt placement to avoid neck contact.
Correct harness strap height for rear-facing and forward-facing, and chest clip placement.
Steps for placing the child, securing the harness, and tightening straps.
Correct placement of the chest clip at armpit level for optimal safety.
Guidance on selecting the correct buckle slot based on child's direction and weight.
Detailed steps for adjusting the harness position and buckle slot.
Step-by-step guide for removing and replacing harness straps.
Warning on when to use the clip and instructions for its attachment.
Information on when the child restraint is certified for aircraft use (harness mode only).
Instructions for rear-facing and forward-facing aircraft installation using a lap belt.
Instructions for attaching and using the cup holder.
Information on how to adjust the expandable side wings for comfort.
Instructions for washing seat pad, infant support, and harness/buckle pads.
Instructions for spot cleaning harness straps and plastic parts.
Overview of the standard one-year warranty for products sold in the USA.
Details on the complimentary extended warranty and its limitations for US models.
Statements on liability limits and the policy for product returns and refunds.
Overview of the standard one-year warranty for products sold in Canada.
Details on the complimentary extended warranty and its limitations for Canadian models.
| Category | Car Seat |
|---|---|
| Brand | Diono |
| Model | radian 3RX |
| Type | Convertible Car Seat |
| Weight Limit | 5-120 lbs |
| Rear-Facing Limit | 5-50 lbs |
| Forward-Facing Limit | 22-65 lbs |
| Booster Limit | 50-120 lbs |
| Installation Type | Latch or Seatbelt |
| Harness Slots | 12-position adjustable harness |
| Recline Positions | 5 |
| Folding for Storage | Yes |
| Forward-Facing Height Limit | Up to 57 inches |
| Dimensions | 17 x 28.5 inches |
| Car Seat Width | 17 inches |
| Safety Features | Steel Alloy Frame |
| Fabric Type | Machine-washable fabric |
| Material | Steel Alloy Frame |
| Rear-Facing Height Limit | Up to 44 inches |
| Booster Height Limit | 40-57" |
| Cup Holders | 2 removable cup holders |












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