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# Central Manager Initialization Options

Keys used to pass options when initializing a central manager.

## Topics

### Constants

[`CBCentralManagerOptionShowPowerAlertKey`](/documentation/CoreBluetooth/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.

[`CBCentralManagerOptionRestoreIdentifierKey`](/documentation/CoreBluetooth/CBCentralManagerOptionRestoreIdentifierKey)

A string containing a unique identifier (UID) for the central manager to instantiate.


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