IP14/14p/14pm 3.7INCH/Three/Four Color version/Full series of all passive nfc e-ink screen mobile phone case

TES DEVELOPS A SERIES OF ALL PASSIVE NFC E-INK SCREEN MOBILE PHONE CASE.IT CAN SUPPORT BLACK&WHITE, RED&WHITE, AND 7-COLOR E-INK SCREENS.THEY DO NOT REQUIRE CHARGING BUT USE NFC TRANSMISSION. THE COMPANY HAS DEVELOPED THE MOBILE APP SPECIFICALLY THAT ALLOWS USERS TO CUSTOMIZE THE CONTENT BY UPLOADING THEIR OWN IMAGES OR PHOTOS ACCORDING TO THEIR PREFERENCES.ALSO THE APP PROVIDES A LARGE SELECTION OF IMAGES FOR USERS TO CHOOSE FROM AND ALLOWS THEM TO EDIT THE IMAGE EFFECTS.AND THE FUNCTIONS ARE STILL BEING CONTINUOUSLY IMPROVED. CURRENTLY, THE E-INK SCREEN IS AVAILABLE IN THREE SIZES:1.78 INCHES,3.7 INCHES,4.2 INCHES.