WaveShare 4.2inch passive NFC powered e-Ink / e-Paper display

This NFC-powered 4.2-inch e-paper display operates without batteries and has a resolution of 400 x 300 pixels. You can easily transfer the images and data you want to display to the e-paper wirelessly via your smartphone or an NFC writer. The Android app is somewhat difficult to use since the menu is in Chinese. However, sending text or displaying an image is quite simple. Alternatively, you can also use the Waveshare ST25R3911B NFC Development Kit as an NFC writer.

Features:
Displays on the screen remain visible even without power supply.
High contrast, making it very readable in daylight.
No power adapter or battery required.
Display can be easily changed via smartphone app or NFC writer.

Technical Details:
Interface: Wireless NFC
Dimensions: 105.1 × 94.1 × 10 mm
Display dimensions: 84.8 × 63.6 mm
Pixel size: 0.212 × 0.212 mm
Resolution: 400 x 300 pixels
Display color: Black / White (2 grayscale)
Full refresh time: 4 s
Viewing angle: >170°
Weight: 82 g

Delivery includes:
1x 4.2-inch passive NFC-powered e-ink / e-paper display.