# kIOPropertyMediumRotationRateKey ``` #define kIOPropertyMediumRotationRateKey ``` ## Discussion This key is used to indicate the medium rotation rate in RPM of the device. Requirement: Optional. Example: ```objc Device Characteristics Vendor Name AAPL Product Name FireWire Target Product Revision Level 0000 Rotation Rate 7200 ``` --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)