> For the complete documentation index, see [llms.txt](https://qudelix.gitbook.io/home/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://qudelix.gitbook.io/home/5k/getting-started/bluetooth-pairing-ios.md).

# Bluetooth Pairing (iOS)

1. **Turning on the 5K**
   * To turn on the 5 K, press and hold the bottom button with the Blue LED for over 3 seconds.
2. **Entering Pairing Mode**
   * Press the top button with the Blue LED for over 3 seconds to enter pairing mode.
   * The Red and Blue LEDs will blink alternately when the device enters pairing mode.
3. **iOS Setting Up Bluetooth on an iPhone**
   * <https://support.apple.com/guide/iphone/bluetooth-accessories-iph3c50f191/ios>
   * Search for Bluetooth devices (Scan), and select Qudelix-5K from the list.

<figure><img src="/files/5rsBUwtVaDMckesfof2I" alt="" width="375"><figcaption><p>Bluetooth Scan &#x26; Pairing</p></figcaption></figure>

4. **Pairing Complete**
   * Once pairing is successfully completed, Qudelix-5K Connected ⓘ will appear under MY DEVICES, as shown in the image below.

<figure><img src="/files/dem8dq01BrGgCvNOmMXt" alt="" width="375"><figcaption><p>iOS Bluetooth Paired Device</p></figcaption></figure>

{% hint style="danger" %}
Displaying as Connected ⓘ means the device is recognized as an audio device. If it only shows as Connected without ⓘ, it indicates that the Qudelix iOS app is connected to the device via a BLE (Bluetooth Low Energy) link. For more details, refer to the [iOS app connection](/home/5k/getting-started/bluetooth-pairing-ios/ios-app-connection.md) section.
{% endhint %}

{% hint style="warning" %}
**iPhone Bluetooth Scanning Issue**

In some cases, iPhones may temporarily fail to scan for or discover nearby Bluetooth devices. This is a known iPhone/iOS issue and is not specific to Qudelix.

If the Qudelix device does not appear during Bluetooth scanning, turn Bluetooth OFF on your iPhone, wait a few seconds, and then turn it back ON. This refreshes the Bluetooth scanning process and usually resolves the issue.
{% endhint %}