---
title: kUSBInformationDeviceIsOnThunderboltMask
framework: kernel
role: symbol
role_heading: Enumeration Case
path: kernel/usbdeviceinformationbits/kusbinformationdeviceisonthunderboltmask
---

# kUSBInformationDeviceIsOnThunderboltMask

The mask indicating that the USB device is on a Thunderbolt port.

## Declaration

```occ
kUSBInformationDeviceIsOnThunderboltMask = (1 << kUSBInformationDeviceIsOnThunderboltBit)
```