---
title: "readAttributeBatIECDesignation(completionHandler:)"
framework: matter
role: symbol
role_heading: Instance Method
path: "matter/mtrbaseclusterpowersource/readattributebatiecdesignation(completionhandler:)"
---

# readAttributeBatIECDesignation(completionHandler:)

## Declaration

```swift
func readAttributeBatIECDesignation(completionHandler: @escaping @Sendable (String?, (any Error)?) -> Void)
```

```swift
func readAttributeBatIECDesignation() async throws -> String
```