NFC writing can be secured by setting password so that only the device administrator can change the settings. 2) Batch change function for setting up multiple projectors You can use the app to change the up to 100 projector’s settings as a batch and apply them by holding your iPhone® over the NFC tags on each projector. In addition, you can export a CSV file to edit multiple projector information using spreadsheet software and then import it into the app to change projector's settings. 3) Projector management feature You can make the routine management of projectors a breeze, using information such as operation time and error logs read by NFC tag even when they are powered off. Projectors that support the app: Epson high-brightness projectors that support the NFC function For details, please visit the Epson website. You can also check compatibility in the web manual accessed from “Web Support” in the app’s support menu. The screenshot is an example and may differ from actual specifications.