# @ohos.bluetooth.constant (Bluetooth Constant Module) (System API)

The **constant** module provides definitions of the constants used in Bluetooth.

> **NOTE**
>
> - 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.
> - 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).

## Modules to Import

```js
import { constant } from '@kit.ConnectivityKit';
```

## AccessAuthorization<sup>11+</sup>

Enumerates the access permissions.

**System API**: This is a system API.

**System capability**: SystemCapability.Communication.Bluetooth.Core

| Name                | Value | Description    |
| ------------------ | ---- | ------ |
| UNKNOWN<sup>11+</sup> | 0    | Unknown.<br>This is a system API. |
| ALLOWED<sup>11+</sup> | 1    | Access allowed.<br>This is a system API. |
| REJECTED<sup>11+</sup> | 2    | Access rejected.<br>This is a system API.|