1# Vibrator Overview 2 3 4The **vibrator** module extends the vibrator service via maximizing utilization of vibrator hardware capabilities. By innovatively integrating vibration and interaction, the module takes user interaction efficiency and usability to the next level. 5 6 7## Working Principles 8 9The vibrator is a Misc device that consists of four modules: Vibrator API, Vibrator Framework, Vibrator Service, and HDF layer. 10 11 **Figure 1** Vibrator in Misc devices 12 13 14 15- Vibrator API: provides basic vibrator APIs, including the APIs for obtaining the vibrator list, querying the vibrator by effect, and triggering and stopping vibration. 16 17- Vibrator Framework: manages the framework layer of the vibrator and communicates with the Misc Device Service. 18 19- Vibrator Service: manages services of vibrators. 20 21- HDF layer: adapts to different devices. 22 23 24## Constraints 25 26When using a vibrator, you must declare the **ohos.permission.VIBRATE** permission before you can control the vibration effect. 27
