---
title: DeviceRequestAsync
framework: IOKit
role: symbol
role_heading: Instance Property
platforms: [Mac Catalyst 18.4+, macOS 10.14+]
path: iokit/iousbdeviceinterface942/2977140-devicerequestasync
---

# DeviceRequestAsync

## Declaration

```occ
IOReturn (*DeviceRequestAsync)(void *self, IOUSBDevRequest *req, IOAsyncCallback1 callback, void *refCon);
```