---
title: kIOUSBEndpointDirectionUnknown
framework: kernel
role: symbol
role_heading: Enumeration Case
path: kernel/tiousbendpointdirection/kiousbendpointdirectionunknown
---

# kIOUSBEndpointDirectionUnknown

## Declaration

```occ
kIOUSBEndpointDirectionUnknown = 2
```