---
title: "readAttributeOpenDuration(completion:)"
framework: matter
role: symbol
role_heading: Instance Method
path: "matter/mtrbaseclustervalveconfigurationandcontrol/readattributeopenduration(completion:)"
---

# readAttributeOpenDuration(completion:)

## Declaration

```swift
func readAttributeOpenDuration(completion: @escaping @Sendable (NSNumber?, (any Error)?) -> Void)
```

```swift
func readAttributeOpenDuration() async throws -> NSNumber
```