# Hybrid™ SI 3\-in\-1 Booster Seat \| live price, prepared checkout ## Built for shopping agents: what RoboTrunk does for every product We asked shopping agents, including Meta's Muse first-hand, what they need from a store. This is what they asked for, and what we have built. RoboTrunk is working through its catalogue, so a step may not be done for this one yet. Where a step is done per product, the line ends with what is done for this product. - **Deep research:** We read the maker's manual, independent reviews, video review transcripts and the store's own page, and publish each finding with its source and the date read. `check_product` returns them with a source for each. *This product:* 6 checked facts, research depth quick pass, checked 2026-09-23T20:11:13.208Z, in the [evidence pack](/agent/evidence/babytrend-com--hybrid-si-3-in-1-combination-booster-car-seat-with-side-impact-protection). - **Receipts:** Every published fact has a receipt showing its source quote. `check_product` and `get_product` return the checked facts that have one. *This product:* each checked fact listed below has one; the source quotes are in the [evidence pack](/agent/evidence/babytrend-com--hybrid-si-3-in-1-combination-booster-car-seat-with-side-impact-protection). - **Safety:** `check_product` asks the product-safety regulators live (US CPSC, NHTSA and FDA, Health Canada, the UK's OPSS, Australia's ACCC) whether a recall names a product, listed here or not, and flags a match with its notice; a recall never blocks the buyer. *This product:* this page holds no recall result for it yet; `check_product` asks the regulators now. - **Recall watch:** `watch_recalls` tells the buyer if a product bought here is recalled later. - **Second-hand listings:** `check_listing` runs the same recall check on a second-hand listing someone found, and adds what the listing leaves out and the price new. - **The real price:** The full price to the buyer's country, with shipping and tax, each part quoted from the store's policy or, where a part is not settled, what the total depends on: `check_product` and `search_catalog` take the buyer's country and postcode. *This product:* this store's price was read from its catalogue at 2026-10-25T20:17:17.585Z. - **A checkout that finishes:** RoboTrunk lists only stores whose agent checkout it has verified. `create_checkout` prepares the order at the store; `complete_checkout` returns a link to the store's own checkout. The checkout can be finished in either of two ways: the person taps the link in their own browser, or their agent opens it and completes the checkout. RoboTrunk checks the store's total against a budget ceiling before it issues the link. Payment always happens on the store's own page, and RoboTrunk never holds the money. No store pays for placement; RoboTrunk may earn a commission from some stores via their affiliate programs. - **Markdown copy:** Every page has a Markdown copy: [this page's copy](https://robotrunk.com/products/ucp/babytrend-com/14627505570161.md). - **Photos and ratings:** Search results carry the product photo and, where the store's own page publishes one, its rating (`search_catalog`). - **Fit answers:** `check_fit` answers whether a listing fits a car, pram or bottle, with the exact quote from the store's page, or says it is not known. - **Back-in-stock watches:** `watch_back_in_stock` starts a watch on a listing the store shows as sold out; `get_back_in_stock_watch` shows when it is back in stock. - **Maker's manual:** `ask_product_manual` answers from the maker's manual with the exact passage and page, or says the manual does not cover it. - **Tools and guide:** Every tool and its description is at https://robotrunk.com/mcp; the guide is at [/agents\.md](/agents.md). - **Research from other stores:** Coming soon: reading other stores' listings of the same product as new research sources. Sold and shipped by babytrend\.com, babytrend.com; payment happens on the store's own checkout. Brand: Baby Trend ## Variants - Hoboken Black: USD 79.99; out of stock. Variant id: `gid://shopify/ProductVariant/52125742137713` - Seller: babytrend\.com. Price: USD 79\.99. Stock: out of stock. Variant: Hoboken Black, variant id `gid://shopify/ProductVariant/52125742137713`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://baby-trend-inc.myshopify.com/products/hybrid-si-3-in-1-combination-booster-car-seat-with-side-impact-protection). [Comparison page](/compare/want/booster-car-seats-approved-for-airplane-use). [Get ready to buy from babytrend\.com: prepare checkout](/checkout-prepare?merchant=babytrend-com&product_id=gid%3A%2F%2Fshopify%2FProduct%2F14627505570161&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F52125742137713). - Dash Plum: USD 79.99; in stock. Variant id: `gid://shopify/ProductVariant/52045289030001` - Seller: babytrend\.com. Price: USD 79\.99. Stock: in stock. Variant: Dash Plum, variant id `gid://shopify/ProductVariant/52045289030001`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://baby-trend-inc.myshopify.com/products/hybrid-si-3-in-1-combination-booster-car-seat-with-side-impact-protection). [Comparison page](/compare/want/booster-car-seats-approved-for-airplane-use). [Get ready to buy from babytrend\.com: prepare checkout](/checkout-prepare?merchant=babytrend-com&product_id=gid%3A%2F%2Fshopify%2FProduct%2F14627505570161&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F52045289030001). - Dash Orchid: USD 79.99; out of stock. Variant id: `gid://shopify/ProductVariant/52045289062769` - Seller: babytrend\.com. Price: USD 79\.99. Stock: out of stock. Variant: Dash Orchid, variant id `gid://shopify/ProductVariant/52045289062769`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://baby-trend-inc.myshopify.com/products/hybrid-si-3-in-1-combination-booster-car-seat-with-side-impact-protection). [Comparison page](/compare/want/booster-car-seats-approved-for-airplane-use). [Get ready to buy from babytrend\.com: prepare checkout](/checkout-prepare?merchant=babytrend-com&product_id=gid%3A%2F%2Fshopify%2FProduct%2F14627505570161&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F52045289062769). - Hoboken Teal: USD 79.99; in stock. Variant id: `gid://shopify/ProductVariant/52125740433777` - Seller: babytrend\.com. Price: USD 79\.99. Stock: in stock. Variant: Hoboken Teal, variant id `gid://shopify/ProductVariant/52125740433777`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://baby-trend-inc.myshopify.com/products/hybrid-si-3-in-1-combination-booster-car-seat-with-side-impact-protection). [Comparison page](/compare/want/booster-car-seats-approved-for-airplane-use). [Get ready to buy from babytrend\.com: prepare checkout](/checkout-prepare?merchant=babytrend-com&product_id=gid%3A%2F%2Fshopify%2FProduct%2F14627505570161&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F52125740433777). ## Checked facts Each fact below was checked against the source it cites before it was published. Each carries that source's link and the time RoboTrunk read it. 6 checked facts, checked 2026-09-23T20:11:13.208Z. Research depth: quick pass. Quick pass: researched from the store's own listing and 3 outside sources \(Maker’s archived product page for the Dash Plum FB49F32B model and its product family; Web\-accessible copy of the 50\-page owner’s manual for model family FB49XXXB\-S; Independent hands\-on review by child\-passenger\-safety technicians\) in one five\-minute research turn, then checked by the grader\. A deeper read of every page may follow later\. - Modes: The seat works in three forward\-facing configurations: with its 5\-point harness, as a high\-back booster and as a backless booster\.. Source: (listing), read 2026-09-23T19:04:14.169Z. - Lifespan: The harness and high\-back portion expire six years after manufacture, while the backless booster portion expires after ten years\.. Source: (review), read 2026-09-23T20:03:46.045Z. - Side\-impact features: It has a height\-adjustable headrest and side\-impact pods attached to the frame\.. Source: (listing), read 2026-09-23T19:04:14.169Z. - Aircraft use: The reviewed seat is FAA\-approved only when used in harness mode\.. Source: (review), read 2026-09-23T20:03:46.045Z. - Installation: The reviewer found that the front\-entry installation method can be confusing and that the seat can be difficult to install and use correctly on every trip\.. Source: (review), read 2026-09-23T20:03:46.045Z. - Booster usability: The reviewer found the high\-back booster’s vehicle\-belt guide difficult to thread\.. Source: (review), read 2026-09-23T20:03:46.045Z. The full evidence pack, with every citation, source and gap: [evidence pack](/agent/evidence/babytrend-com--hybrid-si-3-in-1-combination-booster-car-seat-with-side-impact-protection) To buy this through RoboTrunk, pass merchant `babytrend-com`, product_id `gid://shopify/Product/14627505570161` and one variant_id from the list above. Product image of Hybrid™ SI 3\-in\-1 Booster Seat, supplied by babytrend\.com: This product on babytrend.com: Retrieved 2026-10-25T20:17:17.585Z from 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)