Transparent cover window provides critical information when the cover is closed. Answer or reject calls when through the closed folio It applys to: For Samsung Galaxy Note 20 Ultra, Note20 Ultra Available colors:Black,Green,Pink,Silver Note: Before update the phone software, please dismantle the mobile phone cover , after mobile phone upgrade is completed then installation of mobile phone cover. Such as wearing a mobile phone cover to upgrade the phone system will make phone cover chips can not adapt with the phone system, resulting in that mobile phone cover can not be used. When the NFC function of the phone is turned on, the protective cover can realize the mirror intelligent function and the automatic wake-up / close screen function. Please avoid the phone near the metal object, or may not be able to achieve the above functions. Note: Please do not forget to dismantle the phone cover before updating the system of your phone. It is good for your phone cover. We appreciate your understanding and patience.