1# @ohos.bluetooth.constant (Bluetooth Constant Module) (System API)
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3The **constant** module provides definitions of the constants used in Bluetooth.
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5> **NOTE**
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7> - The initial APIs of this module are supported since API version 10. Newly added APIs will be marked with a superscript to indicate their earliest API version.
8> - This topic describes only the system APIs provided by the module. For details about its public APIs, see [@ohos.bluetooth.constant (Bluetooth Constant Module)](js-apis-bluetooth-constant.md).
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10## Modules to Import
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12```js
13import { constant } from '@kit.ConnectivityKit';
14```
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16## AccessAuthorization<sup>11+</sup>
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18Enumerates the access permissions.
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20**System API**: This is a system API.
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22**System capability**: SystemCapability.Communication.Bluetooth.Core
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24| Name                | Value | Description    |
25| ------------------ | ---- | ------ |
26| UNKNOWN<sup>11+</sup> | 0    | Unknown.<br>This is a system API. |
27| ALLOWED<sup>11+</sup> | 1    | Access allowed.<br>This is a system API. |
28| REJECTED<sup>11+</sup> | 2    | Access rejected.<br>This is a system API.|
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