Screens
7.5″ display
800×480 résolution
2-level greyscale
170° viewing angle
Refresh Time – 5s + data transfer time

4.2″ display
400×300 resolution
2-level greyscale
170° viewing angle
Refresh Time – 4s + data transfer time
Wireless Connectivity – NFC
Power Supply – Wireless over NFC
Dimensions
4.2″ model: 105.0 x 94.1 x 9.90mm
7.5″ model: 195.84 x 137.68 x 13 mm

The 4.2″ model is sold on Aliexpress for $42.29 shipped with free shipping, and the 7.5″ model for $70.19 from the same shop.

génial !