---
title: kUSBPowerRequestSleepRelease
framework: kernel
role: symbol
role_heading: Enumeration Case
path: kernel/usbpowerrequesttypes/kusbpowerrequestsleeprelease
---

# kUSBPowerRequestSleepRelease

The system requests a release of power upon sleeping.

## Declaration

```occ
kUSBPowerRequestSleepRelease = 3
```

## Discussion

Discussion When you use this enumeration with ReturnExtraPower, it sends a message to all devices to return any sleep power, if possible.