---
title: "readAttributeMeasurementUnit(completion:)"
framework: matter
role: symbol
role_heading: Instance Method
path: "matter/mtrbaseclusterradonconcentrationmeasurement/readattributemeasurementunit(completion:)"
---

# readAttributeMeasurementUnit(completion:)

## Declaration

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

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