# Infant car seat bases that install with a vehicle seat belt Which infant car seat bases can be installed using the car's seat belt? Maxi\-Cosi Peri 180° Rotating Infant Car Seat Base: The base has an integrated belt lock\-off for seat belt installation\. TensionFix red\-to\-green visual indicators on the base show when the base is secured from the LATCH or vehicle belt\. Maxi\-Cosi Infant Car Seat Base \(with Load Leg\): Integrated belt lock\-off for secure vehicle belt installation Red\-to\-green tightness indicators confirm accurate installation Maxi\-Cosi Ambra Infant Car Seat Base: An integrated belt lock\-off supports installation with a vehicle seat belt\. TensionFix uses a red\-to\-green indicator to show when the vehicle belt has tension\. ### 1. [Maxi\-Cosi Peri 180° Rotating Infant Car Seat Base](/products/ucp/maxicosi-com/7638087467062) (sold by maxicosi\.com) The base has an integrated belt lock\-off for seat belt installation\. - Seat\-belt installation: The base has an integrated belt lock\-off for seat belt installation\. (listing) - Tightness indicator: TensionFix red\-to\-green visual indicators on the base show when the base is secured from the LATCH or vehicle belt\. (listing) - Stability: The anti\-rotation load leg limits back and forth movement for stability\. (listing) ### 2. [Maxi\-Cosi Infant Car Seat Base \(with Load Leg\)](/products/ucp/maxicosi-com/7638084976694) (sold by maxicosi\.com) Integrated belt lock\-off for secure vehicle belt installation - Seat\-belt installation: Integrated belt lock\-off for secure vehicle belt installation (listing) - Tightness indicator: Red\-to\-green tightness indicators confirm accurate installation (listing) - Stability: Anti\-rotation stability leg reduces movement for head and neck protection in a crash (listing) ### 3. [Maxi\-Cosi Ambra Infant Car Seat Base](/products/ucp/maxicosi-com/9071609741366) (sold by maxicosi\.com) An integrated belt lock\-off supports installation with a vehicle seat belt\. - Seat\-belt installation: An integrated belt lock\-off supports installation with a vehicle seat belt\. (guide) - Tightness indicator: TensionFix uses a red\-to\-green indicator to show when the vehicle belt has tension\. (guide) - Stability: The base includes an anti\-rotation load leg for added stability\. (guide) Every value in the table is a fact RoboTrunk checked, linked to the page it came from\. A dash means no checked fact fills that cell\. Prices and stock change, so this page prints neither: each product name links to its RoboTrunk page, which shows them live\. Written 2026-10-11T06:01:22.362Z. This page is published by RoboTrunk, a store built for shopping agents. The store named on this page sells the product and ships it. RoboTrunk is not the seller and never holds the money. Buying works in one path. RoboTrunk's tools prepare a checkout at that store, then hand back a short-lived link. The person approves the total; once RoboTrunk has checked the store's total against it, the person is given the checkout link to tap in their own browser, or, if the person prefers and gives permission, their agent may open the link and finish there, and payment always happens on the store's own checkout page. RoboTrunk never takes the payment or sees a card. Where the rest of this site is: - /agent/story.md is what RoboTrunk is and how it works, in full. - /agent/tools.json is every tool, its arguments and its answers. - /agent/merchants is every store you can buy from through RoboTrunk. - /products/ucp is every store's indexed products. - /products/search is one search across every store, in plain words. - [What RoboTrunk is](/agent/story.md) - [Every tool, in your browser through WebMCP](/agent) - [The tools and how to call them](/agent/tools.json) - [The stores you can buy from](/agent/merchants) - [Every store's products](/products/ucp) - [Search every store at once](/products/search)