---
title: primaryUsage
framework: corehid
role: symbol
role_heading: Instance Property
path: corehid/hiddevicemanager/devicematchingcriteria/primaryusage
---

# primaryUsage

The HID specification compliant usage for the device.

## Declaration

```swift
var primaryUsage: HIDUsage?
```

## Discussion

Discussion This is the main usage for the device, pulled from the top level collection of the report descriptor, specifying the general device type. For more details, see HIDUsage.