---
title: bTransferType
framework: IOKit
role: symbol
role_heading: Instance Property
platforms: [Mac Catalyst 18.4+, macOS 10.8+]
path: iokit/iousbendpointproperties/1426064-btransfertype
---

# bTransferType

One of kUSBControl, kUSBBulk, kUSBIsoc, or kUSBInterrupt

## Declaration

```occ
UInt8 bTransferType;
```