Colorful 4-color E-paper Photo Frame 4.0-inch Screen E-Ink Smart Employee ID Card Instant Refresh Temporary Visitor Card NFC&BLU

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