---
title: Additional Specifications
framework: USBDriverKit
role: collectionGroup
role_heading: API Collection
path: usbdriverkit/additional-specifications
---

# Additional Specifications

Request information from a device and get hardware and timing information.

## Topics

### Device Requests

- [Standard Device Requests](usbdriverkit/standard_device_requests-enum.md)
- [IOUSBDeviceRequest](usbdriverkit/iousbdevicerequest.md)
- [IOUSBDeviceRequestSetSELData](usbdriverkit/iousbdevicerequestsetseldata.md)
- [tIOUSBDeviceRequest](usbdriverkit/tiousbdevicerequest.md)
- [tIOUSBDeviceRequestTypeValue](usbdriverkit/tiousbdevicerequesttypevalue.md)
- [tIOUSBDeviceRequestRecipientValue](usbdriverkit/tiousbdevicerequestrecipientvalue.md)
- [Get Status Options](usbdriverkit/get_status_options-enum.md)
- [Suspend Feature Options](usbdriverkit/suspend_feature_options-enum.md)
- [Link Power Management Capabilities](usbdriverkit/link_power_management_capabiliti-enum.md)
- [Standard Feature Selectors](usbdriverkit/standard_feature_selectors-enum.md)

### Hub Port Status Requests

- [IOUSB30HubPortStatusExt](usbdriverkit/iousb30hubportstatusext.md)
- [tIOUSBDeviceRequestDirectionValue](usbdriverkit/tiousbdevicerequestdirectionvalue.md)
- [tIOUSB30HubExtStatus](usbdriverkit/tiousb30hubextstatus.md)
- [tIOUSB30HubPortStatusCode](usbdriverkit/tiousb30hubportstatuscode.md)
- [Hub Parameters](usbdriverkit/hub_parameters-enum.md)

### Device Notifications

- [tIOUSB30DeviceNotificationType](usbdriverkit/tiousb30devicenotificationtype.md)

### Electrical Characteristics

- [tIOUSB20BusCurrent](usbdriverkit/tiousb20buscurrent.md)
- [tIOUSB30BusCurrent](usbdriverkit/tiousb30buscurrent.md)
- [tIOUSBBusVoltage](usbdriverkit/tiousbbusvoltage.md)

### Timing Parameters

- [tIOUSB30LinkStateTimeout](usbdriverkit/tiousb30linkstatetimeout.md)
- [tIOUSB30ResetTimeout](usbdriverkit/tiousb30resettimeout.md)
- [tIOUSB30TimingParameters](usbdriverkit/tiousb30timingparameters.md)
- [Timing Parameters](usbdriverkit/timing_parameters-enum.md)

## See Also

### USB Specifications

- [USB Device Descriptors](usbdriverkit/usb-device-descriptors.md)
- [Registry Property Names](usbdriverkit/registry-property-names.md)
- [Utilities](usbdriverkit/utilities.md)