Defective products may only be exchanged within 90 days of purchase. In order to process your exchange, we will need your order number, description of your setup (including photos if available), and any other information about your use of the product that may help us understand the potential defect.
In the event that a product is determined to be defective due to a manufacturer error or defective materials, we will repair or exchange the product as needed. If Blue Robotics determines that repair or replacement of a defective product is not practical, we will provide a refund.
90 Days is what is written in our Terms and Conditions.
We have been making incremental updates and upgrades to all of our products over the years, this blog post summarizes our more recent changes: BlueROV2 and Thruster Updates for 2020
Our more recent changes have made spontaneous damage unlikely, however if you do experience an issue, send us an e-mail to firstname.lastname@example.org so we can do analysis and determine if it is a manufacturing defect that needs to be further addressed and subsequently replaced or an operational one.
May I ask what guarantee you are expecting or looking for?