4.2inch Passive NFC Powered e Paper without Battery

Overview There is a screen, powered without battery or cable. How it displays the images? You may think it is impossible. But with the help of NFC and e-Paper technology, this kind of screen has realized an uncharged screen. If you have a smartphone that has the NFC function, you can use your phone to control this screen and transmit images to it. Then the screen will remain the image for weeks without power until you transmit another image. Description 4.2inch NFC-Powered E-Paper Adopts Novel Passive NFC Technology. No Battery Required, No More Battery Life Trouble. Wireless NFC-Powered Display Refreshing No Messy Wiring, Stable Operation, Fast Refreshing How It Works To Refresh The Display Content,Use A Smart Phone With NFC Function, Or An NFC Reader,Close To The E-Paper For Both Wireless Powering And Data Transfer Feel The Magic Comes With Android APP, As Easy As Swiping A Credit Card Application Examples Suitable For Price Tags, Asset/Equipment Tags, Shelf Labels, Conference Name Tags... Specification POWER SUPPLYWireless DISPLAY COLOR Black / White DOT PITCH 0.212×0.212 RESOLUTION 400×300 VIEWING ANGLE >170° GREYSCALE 2 REFRESH TIME 4s (data transfer time is not included) Supported Smart Phones Most Android Phones With NFC Function Are Supported,Some Tested And Confirmed Devices Are Listed Below (Include But Not Limited To) BRANDSMARTPHONES HUAWEI MATE 10, MATE 20, MATE 20 Pro, P20, P30, Honor 10 Samsung NOTE 9, NOTE 8, S9/S9+, A8S Sony Xperia XZ3, Xperia XZ1 Google PIXEL 3/3XL, PIXEL 2/2XL, PIXEL 1 LG V40, V30+, V30, G7, G7+, G6 MI MI 8, MIX3, MIX 2S, MIX1/2, IM6, NOTE3, NOTE 2 HTC U12+, U11, U11 EYEs, U11, U Ultra, Desire 10 pro, ONE A9S Motorola Z3, Z2, Z ONEPLUS OnePlus 5/5T/6/6T Dimensions Part List 4.2inch NFC-Powered e-Paper x1 Double-sided foam tape x2