---
title: attenuationLevelValues
framework: exposurenotification
role: symbol
role_heading: Instance Property
path: exposurenotification/enexposureconfiguration/attenuationlevelvalues
---

# attenuationLevelValues

The level values for attenuation.

## Declaration

```swift
var attenuationLevelValues: [NSNumber] { get set }
```

## Discussion

Discussion important: This property is available in iOS 12.5, and in iOS 13.5 and later. This property contains eight risk-level values in the range 0-8, one for each range of attenuation. attenuationLevelValues[0] when attenuation > 73. attenuationLevelValues[1] when 73 >= attenuation > 63. attenuationLevelValues[2] when 63 >= attenuation > 51. attenuationLevelValues[3] when 51 >= attenuation > 33. attenuationLevelValues[4] when 33 >= attenuation > 27. attenuationLevelValues[5] when 27 >= attenuation > 15. attenuationLevelValues[6] when 15 >= attenuation > 10. attenuationLevelValues[7] when 10 >= attenuation. note: On iOS 13.7 and 14.0, the framework ignores the values of this property. Instead, it uses [1, 2, 3, 4, 5, 6, 7, 8] for the attenuation level values.

## See Also

### Level Configuration

- [attenuationDurationThresholds](exposurenotification/enexposureconfiguration/attenuationdurationthresholds.md)
- [daysSinceLastExposureLevelValues](exposurenotification/enexposureconfiguration/dayssincelastexposurelevelvalues.md)
- [durationLevelValues](exposurenotification/enexposureconfiguration/durationlevelvalues.md)
- [transmissionRiskLevelValues](exposurenotification/enexposureconfiguration/transmissionrisklevelvalues.md)
- [metadata](exposurenotification/enexposureconfiguration/metadata.md)