> For the complete documentation index, see [llms.txt](https://docs.verifone.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.verifone.com/hardware-products/hardware/engage-devices/m4xx-series/m440/m440-privacy-shield-installation-guide.md).
# M440 Privacy Shield Installation Guide
The M424 and M440 privacy shield safeguards the customer's PIN entry, keeping it confidential and hidden from the cashier or any other onlookers.
Before you begin, confirm you have all devices, cables, and accessories listed below.
## What's in the Box
## Quick Setup Guide
{% stepper %}
{% step %}
### Install the Privacy Shield
{% stepper %}
{% step %}
#### Brush off dust and debris
Brush any loose dust or debris off the front of the device, particularly around the keypad.
{% endstep %}
{% step %}
#### Clean the yellow surface
Clean the yellow surface framing the keypad with an alcohol cleansing pad, and let it dry before you continue.
{% endstep %}
{% step %}
#### Remove the three liners
Peel off all three adhesive liners from the underside of the privacy shield to expose the adhesive strips.
{% endstep %}
{% step %}
#### Align the shield and press it down
Align the privacy shield with the device so that it sits straight along the top. Once aligned, press down on the top edge of the shield for ten seconds, then press down on the left and right sides.
{% endstep %}
{% endstepper %}
{% endstep %}
{% step %}
### Replace the Privacy Shield
Replace the shield if it comes loose or falls off.
{% stepper %}
{% step %}
#### Remove the old shield
Lift the existing privacy shield away from the device, making sure none of it is left attached.
{% endstep %}
{% step %}
#### Clean the mounting area
Use alcohol pads to clean the entire area and make sure no adhesive residue is left from the previous shield.
{% endstep %}
{% step %}
#### Fit a new shield
Follow the installation steps above to fit a new privacy shield.
{% endstep %}
{% endstepper %}
{% endstep %}
{% endstepper %}
{% hint style="info" %}
Order replacement shields by part number **PPL379-014-01-A**. In the USA, contact the Verifone Customer Development Center on 1-800-837-4366, Monday to Friday, 7 A.M. to 8 P.M. Eastern time. Elsewhere, contact your Verifone representative.
{% endhint %}
## Full Installation Guide
For full device setup details, product information, and troubleshooting steps, refer to the [M440 Installation Guide](/hardware-products/hardware/engage-devices/m4xx-series/m440/m440-installation-guide.md) (DOC379-013-EN-A).
---
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