> For the complete documentation index, see [llms.txt](https://8bitmods.gitbook.io/manuals/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://8bitmods.gitbook.io/manuals/bitlink-dc-dongle/features/adapter.md).

# Using the BitLink DC Adapter

The BitLink DC Adapter fits an original Dreamcast controller and connects it to the dongle, wirelessly in 2.4G mode or with a USB-C cable in USB mode. A new dongle and a new adapter pair automatically. Pair again to use a different adapter.

## Pairing over 2.4G

1. Set the dongle to 2.4G mode. The LED is green.
2. Press the dongle's button once. It forgets its adapter and waits for a new one.
3. Press the adapter's power button once. It forgets its dongle and looks for a new one.
4. The LED turns steady green when they connect.

When you set up several players, pair one dongle and adapter at a time.

## Connecting by cable

1. Set the dongle to USB mode and the adapter to wired mode. Both LEDs are white.
2. Connect the adapter's USB-C port to the dongle's USB-C port.

The adapter charges slowly from the dongle while it is connected.

## What the adapter adds

* Rumble on the adapter's built-in motor
* A VMU in the controller, used instead of the dongle's virtual cards
* The adapter's Sync button changes the dongle's memory card
* Wheel mode and Air mouse, using the adapter's motion sensor

The Dreamcast controller's buttons, and the Wheel mode and Air mouse combos, are set on the dongle's WebUI **Mapping** page under **Dreamcast** while the adapter is connected. See [Button mapping](/manuals/bitlink-dc-dongle/webui/button-mapping.md) and [Combo presses](/manuals/bitlink-dc-dongle/webui/combo-presses.md).

<figure><img src="https://3745350575-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FxE7fgXjmB9AkNFHd2vW0%2Fuploads%2Fgit-blob-2588dbb42aaf01c2814a9d227834d0b41abd3ff8%2Fmapping-dreamcast.png?alt=media" alt="Mapping page for the Dreamcast controller, other families greyed out" width="936"><figcaption><p>Mapping for the Dreamcast controller</p></figcaption></figure>


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