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# Customer display
The customer display feature shows real-time order details on a secondary screen during checkout, improving transparency and customer experience.
The **customer display** provides live updates on a secondary screen during the checkout process. It shows:
- Items added to the cart
- Running subtotal
- Payment details
- Total amount due
- Selected **payment method**
- Change to be returned
**Note**
Both the POS screen and customer display should be at least **6 inches** in size. Larger displays are recommended for better visibility.
## **Configuration**
The customer display can be used in two ways:
- Connected directly via **USB-C or HDMI**
- Connected through an **IoT system**
The feature is enabled by default, but you can customize its appearance.
### **Set background image**
1. Go to **POS Settings**
2. Scroll to **Connected Devices**
3. Click **Upload your file** to set a background image
### **Using an IoT-connected display**
To use a screen via IoT:
1. Open **POS Settings**
2. Enable **IoT Box**
3. Click **Save**
Then:
1. **Connect and configure your IoT system**
2. Return to POS settings
3. Select the screen in the **Customer Display** field
## **Open the customer display**
To launch the display:
1. **Open the POS register**
2. Click the menu icon (☰)
3. Select **Customer Display**
The display will either:
- Open in a new browser window (for external screens)
- Appear directly on the IoT-connected display
**Note**
For IoT setups, both the POS and display device must be connected to the same local network.
## **Android dual-screen setup**
For POS terminals running the **Odoo mobile app** with dual-screen support:
1. **Install the Point of Sale Mobile module**
2. Open the POS register
3. Click the menu icon (☰)
4. Select **Customer Display**
The display will automatically appear on the secondary screen.
## **Related resources**
- **IoT system connection**
- **Internet of Things (IoT)**