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# CBService

A collection of data and associated behaviors that accomplish a function or feature of a device.

```
class CBService
```

## Overview

[`CBService`](/documentation/CoreBluetooth/CBService) objects represent services of a remote peripheral. Services are either primary or secondary and may contain multiple characteristics or included services (references to other services).

## Topics

### Identifying a Service

[`peripheral`](/documentation/CoreBluetooth/CBService/peripheral)

The peripheral to which this service belongs.

[`isPrimary`](/documentation/CoreBluetooth/CBService/isPrimary)

A Boolean value that indicates whether the type of service is primary or secondary.

### Accessing Service Data

[`characteristics`](/documentation/CoreBluetooth/CBService/characteristics)

A list of characteristics discovered in this service.

[`includedServices`](/documentation/CoreBluetooth/CBService/includedServices)

A list of included services discovered in this service.


---

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