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# NIDeviceCapability

An interface that adds Boolean values that indicate an interaction session feature support.

```
protocol NIDeviceCapability
```

## Overview

The [`NISession`](/documentation/NearbyInteraction/NISession) class property [`deviceCapabilities`](/documentation/NearbyInteraction/NISession/deviceCapabilities) adopts this protocol. At runtime, inspect this property to determine the available features of an interaction session on the person’s device.

In a compatible iPad or iPhone app running in visionOS, the framework reports that all capabilities are unavailable.

## Topics

### Checking session features

[`var supportsPreciseDistanceMeasurement: Bool`](/documentation/NearbyInteraction/NIDeviceCapability/supportsPreciseDistanceMeasurement)

A Boolean value that indicates whether the device produces precise distance measurements to nearby objects.

[`var supportsDirectionMeasurement: Bool`](/documentation/NearbyInteraction/NIDeviceCapability/supportsDirectionMeasurement)

A Boolean value that indicates whether the device produces instantaneous direction measurements to nearby objects.

[`var supportsCameraAssistance: Bool`](/documentation/NearbyInteraction/NIDeviceCapability/supportsCameraAssistance)

A Boolean value that indicates whether the device can leverage ARKit to improve interaction.

[`var supportsExtendedDistanceMeasurement: Bool`](/documentation/NearbyInteraction/NIDeviceCapability/supportsExtendedDistanceMeasurement)

A Boolean value that indicates whether this device supports extended distance measurement.

[`var supportsDLTDOAMeasurement: Bool`](/documentation/NearbyInteraction/NIDeviceCapability/supportsDLTDOAMeasurement)

A property that indicates if the device supports Downlink Time-Difference-of-Arrival ranging.

[`var supportsBluetoothChannelSounding: Bool`](/documentation/NearbyInteraction/NIDeviceCapability/supportsBluetoothChannelSounding)

A Boolean value that indicates whether the device supports distance measurements over a Bluetooth connection.


---

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