<Device xmlns="http://hl7.org/fhir">
  <id value="s4h-wearable-device-example" />
  <identifier>
    <system value="http://example.com/custom-device-id-namespace" />
    <value value="g639d0821535fd6553fa8764" />
  </identifier>
  <manufacturer value="Acme Corp" />
  <deviceName>
    <name value="Acme SuperDuper Smart Watch" />
    <type value="manufacturer-name" />
  </deviceName>
  <modelNumber value="XS-4000" />
</Device>