<!--
{
  "availability" : [
    "macCatalyst: 14.0.0 -",
    "macOS: 10.15.0 - 27.0.0"
  ],
  "documentType" : "symbol",
  "framework" : "IOUSBHost",
  "identifier" : "/documentation/IOUSBHost/IOUSBHostIsochronousFrame/timeStamp",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Property",
  "symbol" : {
    "kind" : "Instance Property",
    "modules" : [
      "IOUSBHost"
    ],
    "preciseIdentifier" : "c:@S@IOUSBHostIsochronousFrame@FI@timeStamp"
  },
  "title" : "timeStamp"
}
-->

# timeStamp

The observed time for the frame’s completion.

```
var timeStamp: IOUSBHostTime
```

## Discussion

> Note:
> Interrupt latency and system load may result in more than one frame completing with the same timestamp.

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)