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# sendDTMF(_:)

Sends the tone associated with a phone key to the hands-free Bluetooth device.

```
func sendDTMF(_ character: String!)
```

## Parameters

`character`

The phone keypad character for the tone. The character must be one of the following:

- `0-9`
- `#`
- `*`
- `A-D`

---

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