Warm Reminder: Scan the QR code to directly access the download page.
1) The app will detect the e-paper display and automatically perform data transmission and refresh operations.
2) Please ensure that your phone's NFC is enabled before use. During data transmission and refreshing, do not move the phone.

For iOS Users

Search for 'KeyTag' in the Apple App Store on your iPhone, then click "Install."

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111

Wholesale:

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APP Operation Steps

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