---
title: CBCentralManagerOptionShowPowerAlertKey
framework: corebluetooth
role: symbol
role_heading: Global Variable
path: corebluetooth/cbcentralmanageroptionshowpoweralertkey
---

# CBCentralManagerOptionShowPowerAlertKey

A Boolean value that specifies whether the system warns the user if the app instantiates the central manager when Bluetooth service isn’t available.

## Declaration

```swift
let CBCentralManagerOptionShowPowerAlertKey: String
```

## Discussion

Discussion The value for this key is an NSNumber object. If the key isn’t specified, the default value is true.

## See Also

### Constants

- [CBCentralManagerOptionRestoreIdentifierKey](corebluetooth/cbcentralmanageroptionrestoreidentifierkey.md)