Customizable 4.0-inch Digital E-paper Photo Frame Portable Changeable Design Four-color E-ink Screen NFC & Bluetooth ID Badge

Screen: 4.0 inches
Screen colour：4-color
Resolution 528*768
DPI 236
Outer dimension 66.25*104*2.8 mm
Weight 29.4g
Battery Li-On 
rechargeable :100mAh
Transfer:Bluetooth beacon WITH NFC
Super waterproof
All-in-one card integration