---
title: device
framework: healthkit
role: symbol
role_heading: Instance Property
path: healthkit/hkquantityseriessamplebuilder/device
---

# device

The device providing the data.

## Declaration

```swift
@NSCopying var device: HKDevice? { get }
```

## See Also

### Creating a Quantity Series Builder

- [init(healthStore:quantityType:startDate:device:)](healthkit/hkquantityseriessamplebuilder/init(healthstore:quantitytype:startdate:device:).md)
- [quantityType](healthkit/hkquantityseriessamplebuilder/quantitytype.md)
- [startDate](healthkit/hkquantityseriessamplebuilder/startdate.md)