the difference of 3.7inch and 4inch HD
Product Detail
creative case : display photo from iphone album
It's a great revolution VS printed case ,no print required for E-ink cases
A : Neutral app to protect your business -- consumer won't know which factory developed app when downloading app ,
app is AI phone case
B : real IDY cases ,could change 1photo in 1 minute ,
C:Need NFC , no Charge , no wifi , no bluetooth ,
Left one : widely sold in market E-ink 3.7inch 416*240 VS Right one:new develped E-ink HD 4inch 800*480
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