---
title: accessoryDiscoveryToken
framework: nearbyinteraction
role: symbol
role_heading: Instance Property
path: nearbyinteraction/ninearbyaccessoryconfiguration/accessorydiscoverytoken
---

# accessoryDiscoveryToken

An identifier for the accessory in a session.

## Declaration

```swift
@NSCopying var accessoryDiscoveryToken: NIDiscoveryToken { get }
```

## Mentioned in

Initiating and maintaining a session

## Discussion

Discussion The value of this property refers to a specific peer accessory. To match distance updates your app receives through a session with a peer using session(_:didUpdate:), compare the argument object’s discovery token with the value of this property. Subsequent sessions with the same peer device produce a different value for this property. For user privacy, the system assigns a random number unique to the session that prevents the correlation of this property with a particular device.