The Safety 6's design makes it suitable for use as a locator device rather than a small float antenna. It must be attached in a way that allows the light to be visible while not interfering with the life jacket's operation.
The expiration date is printed on the package. Check it, as well as the integrity of the packaging, before storing the product with your onboard equipment.
This light is supplementary: its presence alone does not guarantee that the safety equipment complies with regulations. The life jacket’s instructions and the device’s certified specifications remain the determining factors for this use.