4.2 inch Passive NFC-Powered e-Paper

SKU 17341

Download 4.2-inch Passive NFC e-Paper User Guide

Introducing the NFC-powered 4.2 inch e-Paper Module, a versatile and convenient way to display information without the need for a power supply. With a high-resolution display of 400 x 300, this e-Paper Module is perfect for a wide range of applications, including equipment labels, shelf labels, and information storage.

Key Features

  • No backlight required, allowing the e-Paper to keep displaying the last content for a long time without power.
  • Battery-free design makes it perfect for applications where power is limited, as users can modify the display content by smartphone.
  • Complete control over the displayed content, which can be customized and managed by the user through the supporting Android APP at any time, making it convenient and flexible.
  • Equipped with a durable ABS plastic shell with excellent strength and toughness.
  • Comes with a supporting Android App to help users edit and manage the display content of the ink screen.
  • Complete supporting information and a manual are included.

Possible Applications

  • Perfect for equipment and shelf labels, information storage, and other labelling applications.
  • An ideal solution for electronic price tags in retail stores.
  • Suitable for displaying schedules, menus, and other information in public places like restaurants, airports, and bus stations.
  • Can be used in warehouses to display stock information, making inventory management more efficient.
  • Ideal for displaying medical information and records in hospitals and clinics.

Upgrade your display capabilities with the NFC-powered 4.2inch e-Paper Module, the perfect solution for efficient and customizable information display.

Passive NFC Technology – No Battery Required

Stable and Fast Wireless Power and Data Transfer 

Simple and Easy to Use!

Use the NFC function or NFC reader in your smartphone to refresh the display content. Simply keep the e-Paper close to the smartphone during data or power transmission.

Dedicated Android App

Fast and easy refresh via smartphone – Just like swiping a Credit Card!

Advantages of E-Paper (E-Ink) Display Technology

The E-Paper Display uses microcapsule electrophoretic technology to display content. This technology works by applying an electric field to charged particles suspended in clear fluid, causing the microcapsule to become visible by reflecting ambient light, just like traditional printed paper.

Some of the benefits of this technology are:

  • Clear display without electricity: Display content is clearly visible under lamplight or natural light without a backlight
  • Wide viewing angle: Offers nearly up to 180° viewing angle
  • Paper-like effect: Often used as an e-reader due to its resemblance to traditional printed paper


  • Display Size (Diagonal): 4.2 inch
  • Refresh Time: 4 Seconds (This does not include the data transfer time)
  • Power Supply: Wireless (No need for the battery)
  • Display Colour: Black & White
  • Grey Scale: 2
  • Field of View: > 170°
  • Resolution: 400 x 300 pixels
  • Dot Pitch: 0.212mm x 0.212mm
  • Weight: 79 Grams


  • Outline Dimensions: 105.1mm x 94.1mm
  • Display Dimensions (Screen Area): 84.8mm x 63.6mm

User Instructions for Android App

  1. Scan the QR code to download and install the app on your Android phone (Android 4.0 or above is required).
  2. Click the picture button on the bottom to choose a picture from DCIM or take a picture with the camera. You can also make string pictures manually.
  3. Cut the picture, resize it, and rotate it. We recommend pre-adjusting the picture according to the e-Paper's resolution for best effect.
  4. On the main page, select the process effect (None Effect, Gray Effect, Block Effect, Sketch Effect, and Neon Effect).
  5. Click the Adjust symbol on the left bottom to adjust the brightness and contrast, or touch the "+" symbol on the right bottom to adjust the picture.
  6. After setting, close the NFC area of your phone to the backside of the 4.2inch NFC-Powered e-Paper to update it.
  7. Note: Make sure you have opened the NFC function of your phone and do not move the phone when transmitting and updating.
  8. To draw a picture, click the "..." symbol on the right-top, choose Gallery, and touch one picture to enter drawing mode.

User Instructions for iOS App

  1. Download and install the NFC E-Tag app from the App Store.
  2. Open the app and choose the e-Paper type according to the actual display.
  3. Click the picture button, and place your iPhone's NFC area near the e-Paper's NFC area to update.
  4. Click the Pictures button on the left-bottom to choose the updated pictures, or click the Text button to make a text image.
  5. Click the Adjust button to adjust the brightness and contrast of the picture.

Items Included

  • NFC-Powered e-Paper 4.2-inch
  • Foam Tape Double-Sided (x2)

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