how long are britax car seat bases good for Britax Cypress Infant Car Seat + Alpine Base

how long are britax car seat bases good for Britax Cypress Infant Car Seat + Alpine BaseCherish the journey together with the Cypress infant car seat and Alpine base. This rear facing car seat offers convenience, premium style, and trusted Britax safety, giving you the assurance you need on your first ride home and every drive after. The exclusive ClickTight technology provides a simple installation in 3 easy steps: open, thread and buckle, and click it closed. This newborn car seat offers the perfect combination of style and

Cherish the journey together with the Cypress™ infant car seat and Alpine™ base. This rear-facing car seat offers convenience, premium style, and trusted Britax safety, giving you the assurance you need on your first ride home and every drive after. The exclusive ClickTight® technology provides a simple installation in 3 easy steps: open, thread and buckle, and click it closed. This newborn car seat offers the perfect combination of style and convenience. 

Specifications

• ClickTight indicator helps provide a visual guide while installing the base.
• Infant car seat, rear-facing only; 4 to 30 lbs.
• ClickTight technology ensures secure installation from the first ride and beyond.
• Premium Mélange Fabrics with Double-knit mélange accents have a soft sheen and a smooth finish.
• Includes three padded inserts to help create a cozier and more customized fit; two inserts layer behind the baby's head and neck while the third sits underneath the child for support.
• Check on your little one through the extra-large mesh canopy-window with a quiet magnetic closure.
• Lightweight and easy to carry, this newborn car seat features an aluminum carry handle that adjusts easily with one hand.
• Carry handle provides additional stability when used in the upright position. 
• Washer and Dryer-Friendly for easy cleanup so you can keep moving; no more hand-washing or waiting for fabrics to air-dry! 
• Made with naturally flame-retardant fabrics with no added FR chemicals. 
• Extra cushioning on the head pillow, harness pads, and infant inserts keeps your child comfy and cozy.
• ReboundReduce™ Stability Bar helps minimize movement in the event of a crash. 
• The RightSize™ system provides adjustment points at the hips, shoulders, and between the legs to help you find the perfect fit.
• SpaceSaver™ Design is slim outside and spacious inside! Frees up backseat space while giving your child plenty of room for the ride.
• Built-in harness holders and flip-forward belly pad clear the way for breezy boarding and unboarding.
• Side Impact Tested to protect your child’s head, neck and torso for peace of mind.  
• SafeCell® Technology acts as a crumple zone, helping to keep crash energy away from your child.
• Easy Find & Recline level indicators make finding your vehicle's installation angle easy.
• ClickTight® Indicator helps provide a visual guide while installing the base *Indicator window may vary by model. Refer to user guide for specific instructions. 
• Base-Free Stability: An extra belt path on the back of the seat provides security when installed without the base.
• UPF 50+ canopy & flip-out visor offer more sun protection while in the car or out for a stroll.
• Compatible with Britax Brook™, Brook+, and Gove™ strollers, along with select competitive strollers.
• Designed for rear-facing use only for 4 to 30 pounds and up to 32 inches.
• 1-year warranty.

Dimensions & Weight

• 28.1" D x 16.9" W x 24.1 H
• Carrier with Base: 19.9 lbs.
• Suitable for babies 4-30 lbs.