Display Area: 27mm (height) × 27mm (vertical)
Resolution: 200 × 200, 188 DPI
Communication Method: NFC (Near Field Communication)
Battery: Battery-free
Weight: 12.7g ±0.5g
Displayable Content: Text, barcodes, QR codes, and images
Appearance: Gray frame + matte white cover
Companion App: EINKY
Compatible Mobile Systems: Android / iOS