| ## Biometric HALs ## | |
| --- | |
| ## Overview: ## | |
| The interfaces within the biometrics.* HAL tree are used by the Android Biometric Services | |
| (e.g. FingerprintService, FaceService) to discover and operate biometric sensors on the device. | |
| More details and versioning information can be found within each particular HAL. | |
| More complete information about the Android Biometric HALs and subsystem can be found at | |
| [source.android.com](https://source.android.com/security/biometric). |