# Health Check Hardware wallet and mobile phone devices will eventually go bad. Humidity, temperature, radiation from cosmic rays, and general wear-and-tear can damage digital devices slowly over time, corrupting the data stored on them. To prevent this resulting in the loss of funds, we have our clients periodically run a device health check on all their hardware wallets to ensure they are still working properly. The **Health Check** process signs a message which does not cost anything to the client, and a history of Health Check signatures are kept under the Detail screen for each key. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.casa.io/wealth-security-protocol/chosen-features/health-check.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.