# Setting Up the D135 for the Finix Checkout iOS App

The [Pax D135](/guides/in-person-payments/select-your-device/pax-d135) is a card reader that works with the Finix Checkout iOS app to accept in-person payments. Buyers can pay by tapping, swiping, or dipping their card using the device's:

- Contactless card reader
- Magnetic stripe reader
- IC/smart card (chip) reader

To order a D135, contact your Finix point of contact.

For an in-depth overview of the D135's features and hardware, refer to the [Pax D135 Quick Setup Guide](https://www.pax.us/support/documents/d135-quick-setup-guide/).

## Prerequisites

Before pairing the D135 with your iPhone:

- **Charge the device**: Connect the charging cable to the D135. The charging indicator flashes slowly while charging. When you unplug the cable and the indicator is solid green, the device is fully charged.
- **Turn on the device**: Press and hold the button on the side of the D135 until it beeps and powers on.
- **Enable Bluetooth on your iOS device**: The Finix Checkout iOS app connects to the D135 over Bluetooth. USB is not supported.

## Add the D135

1. Open the **Finix Checkout** app and tap **...** (More) in the navigation bar.

1. Tap **Manage Devices**.

1. Tap the **+** icon in the top-right corner.
   - The **Add a Device** screen displays.

1. Follow the on-screen instructions to make sure the device is on, then tap **Next**.
   - A **Searching for Nearby Devices** screen displays listing nearby Bluetooth devices.

1. Tap the device that matches the serial number (S/N) shown on your D135 or its packaging.
2. On the **Add a Device** screen, optionally update the device name and add a description, then tap **Add Device**.
   - A **Registering Device** message appears, followed by an **Activating Device** message.

1. When prompted with a Bluetooth pairing request on your iPhone, tap **Pair**.
   - A **Connecting to Device** message displays, followed by a **Setting up your device** screen.
   - You only need to complete this setup once.

1. When the device beeps, setup is complete and you are returned to the **Manage Devices** screen.

## Connect the D135

After adding the D135, you need to connect it before taking payments.

1. From the **Manage Devices** screen, tap the device that matches your D135's S/N.
   - The **Device Details** screen displays.

1. Tap **Connect**.
   - A **Setting up your device** screen displays with a progress bar.
2. When complete, you are returned to the **Manage Devices** screen. The device displays a **Connected** status when the connection is successful.

You are now ready to [process payments using the D135](/low-code-no-code/mobile-apps/finix-checkout/taking-a-payment).

## Managing the D135

Tap a device from the **Manage Devices** screen to open its **Device Details** page. From there, you can:

| Action | Description |
|  --- | --- |
| **Connect / Disconnect** | If the device is disconnected, tap **Connect** to reconnect. If the device is connected, tap **Disconnect** to disconnect it. |
| **Edit Details** | Tap **Edit Details** to update the device name or description. |
| **Reset Device** | Tap **Reset Device** to factory reset the D135. After resetting, you will need to [add and connect the device](#add-the-d135) again. |
| **View in Dashboard** | Tap **...** in the top-right corner to open the device's details page in the Finix Dashboard. |

The **Device Details** page also shows the device name, type (PAX D135), serial number, connection status, creation date, and description.

## Next Steps

| Next Step | Description |
|  --- | --- |
| [Take a Payment](/low-code-no-code/mobile-apps/finix-checkout/taking-a-payment) | Process a sale or authorization using the D135.