In many business situations, paperlessness and informatization are all happening changes. At the hotel or retail counter, we use handwriting to sign the payment, the traffic police use the police mobile phone to sign the ticket, the express delivery industry begins to use the signature board to record the signature, and the electromagnetic screen in the business negotiation helps the more efficient contract signing. . These are the changes brought by UUNIPEN™ electromagnetic screen technology, improve work efficiency, realize personal digital storage records, and save the most valuable information.