---
title: value
framework: corebluetooth
role: symbol
role_heading: Instance Property
path: corebluetooth/cbmutablecharacteristic/value
---

# value

The value of the characteristic.

## Declaration

```swift
var value: Data? { get set }
```

## Discussion

Discussion This property contains the value of the characteristic. For example, a temperature measurement characteristic of a health thermometer service may have a value that indicates a temperature in Celsius.

## See Also

### Managing a Mutable Characteristic

- [descriptors](corebluetooth/cbmutablecharacteristic/descriptors.md)
- [properties](corebluetooth/cbmutablecharacteristic/properties.md)
- [permissions](corebluetooth/cbmutablecharacteristic/permissions.md)
- [CBAttributePermissions](corebluetooth/cbattributepermissions.md)
- [subscribedCentrals](corebluetooth/cbmutablecharacteristic/subscribedcentrals.md)