1# Brightness 2 3The Brightness module provides an API for setting the screen brightness. 4 5> **NOTE**<br> 6> The initial APIs of this module are supported since API version 7. Newly added APIs will be marked with a superscript to indicate their earliest API version. 7 8## Modules to Import 9 10```js 11import brightness from '@ohos.brightness'; 12``` 13 14## brightness.setValue 15 16setValue(value: number): void 17 18Sets the screen brightness. 19 20This is a system API and cannot be called by third-party applications. 21 22**System capability:** SystemCapability.PowerManager.DisplayPowerManager 23 24**Parameters** 25 26| Name | Type | Mandatory | Description | 27| ----- | ------ | ---- | ----------- | 28| value | number | Yes | Brightness value, ranging from **0** to **255**.| 29 30**Example** 31 32```js 33brightness.setValue(128); 34``` 35