---
title: USB Power constants
framework: IOKit
role: containerSymbol
role_heading: Enumeration
platforms: [Mac Catalyst 18.4+, macOS 10.0+]
path: iokit/1424648-usb_power_constants
---

# USB Power constants

## Declaration

```occ
enum : unsigned int {
    ...
};
```

## Topics

### Constants

- [kUSB100mA](1424648-usb_power_constants/kusb100ma.md)
- [kUSB100mAAvailable](1424648-usb_power_constants/kusb100maavailable.md)
- [kUSB150mA](1424648-usb_power_constants/kusb150ma.md)
- [kUSB150mAAvailable](1424648-usb_power_constants/kusb150maavailable.md)
- [kUSB2MaxPowerPerPort](1424648-usb_power_constants/kusb2maxpowerperport.md)
- [kUSB3MaxPowerPerPort](1424648-usb_power_constants/kusb3maxpowerperport.md)
- [kUSB500mAAvailable](1424648-usb_power_constants/kusb500maavailable.md)
- [kUSB900mAAvailable](1424648-usb_power_constants/kusb900maavailable.md)
- [kUSBAtrBusPowered](1424648-usb_power_constants/kusbatrbuspowered.md)
- [kUSBAtrRemoteWakeup](1424648-usb_power_constants/kusbatrremotewakeup.md)
- [kUSBAtrSelfPowered](1424648-usb_power_constants/kusbatrselfpowered.md)