---
title: bUsageType
framework: IOKit
role: symbol
role_heading: Instance Property
platforms: [Mac Catalyst 18.4+, macOS 10.8+]
path: iokit/iousbendpointproperties/1425537-busagetype
---

# bUsageType

For interrupt and isoc endpoints, the usage type. For Bulk endpoints of the UAS Mass Storage Protocol, the pipe ID.

## Declaration

```occ
UInt8 bUsageType;
```