The clear plastic item that came with your Ingenico device is likely a protective film or cover used to protect the screen or keypad during shipping and handling. It should be removed before use to ensure the optimal functioning of your device. If it is a cover, it helps prevent scratches and dust buildup while the terminal is in transit. After removing it, your device should be ready for use. If you have any concerns or if the plastic item serves another purpose, please refer to the product manual or contact Ingenico support for clarification.