Transparent cover window provides critical information when the cover is closed.Answer or reject calls when through the closed folioIt applys to: For Samsung Galaxy S21 Ultra 5GAvailable colors:Black,GrayKeeps your phone cleanInfused with an antimicrobial coating, the Smart Clear View Cover blocks microbial growth to help protect against certain bacteria. So you can worry less about germs, and keep your focus on what's at hand.Use your phone, screen unseenStay on top of alerts and notifications even without opening the cover. Icons keep you aware of what you need to know, like messages, battery life, time and more.Easy control at a tapStay on top of alerts and notifications even without opening the cover. Icons keep you aware of what you need to know, like messages, battery life, time and more.Cutting-edge designA clear strip along the side of the cover lets your phone peek out. It also adds a sleek touch to the design of the case.Protected from one side to the otherWith the flip cover on the front and the case on the back, the Smart Clear View Cover surrounds your phone to safeguard it. It even fits snugly to secure the exterior parts, like the camera and buttons.Accurately drivenThe S Pen has 4096-level pressure sensitivity, and the 0.7 mm diameter nib brings a smooth and accurate writing experience. With your Galaxy S21 Ultra 5G smart phone, just hang the pen on the screen of the phone, click the S Pen button to start the floating window command, and the S Pen can start writing or editing.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.