---
title: Characteristic Descriptors
framework: corebluetooth
role: collectionGroup
role_heading: API Collection
path: corebluetooth/characteristic-descriptors
---

# Characteristic Descriptors

Values that represent the UUIDs of the characteristic descriptors.

## Overview

Overview Use these UUIDs to add well-known descriptors to characteristics you create, or to find specific descriptors from characteristics of remote services.

## Topics

### Characteristic Descriptors

- [CBUUIDCharacteristicExtendedPropertiesString](corebluetooth/cbuuidcharacteristicextendedpropertiesstring.md)
- [CBUUIDCharacteristicUserDescriptionString](corebluetooth/cbuuidcharacteristicuserdescriptionstring.md)
- [CBUUIDClientCharacteristicConfigurationString](corebluetooth/cbuuidclientcharacteristicconfigurationstring.md)
- [CBUUIDServerCharacteristicConfigurationString](corebluetooth/cbuuidservercharacteristicconfigurationstring.md)
- [CBUUIDCharacteristicFormatString](corebluetooth/cbuuidcharacteristicformatstring.md)
- [CBUUIDCharacteristicAggregateFormatString](corebluetooth/cbuuidcharacteristicaggregateformatstring.md)
- [CBUUIDL2CAPPSMCharacteristicString](corebluetooth/cbuuidl2cappsmcharacteristicstring.md)