4-color 4.0-inch E-ink Screen Badge E-paper Photo Frame NFC & Bluetooth Waterproof Anti-fall and Dirt-resistant

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