This product ensures that the purchase comes from mobile phone manufacturers' accessory sales channels, absolutely 100% genuine original. The transparent window provides important information when the case is closed. Answer or reject calls when it's through the closed folio. It applies to: For Samsung Galaxy S21 Ultra 5G. Available colors: Black, Gray. Keeps your phone clean. Infused with an antimicrobial coating, the Smart Clear View Cover blocks microbial growth to protect against certain bacteria. So you can worry less about germs and stay focused on what's current. Use your phone, screen unseen. Keep track of alerts and notifications even without opening the case. Icons keep you aware of what you need to know, such as messages, battery life, time, and more. Easy control with a touch. Keep track of alerts and notifications even without opening the case. Icons keep you aware of what you need to know, such as messages, battery life, time, and more. Groundbreaking design. A clear strip along the side of the case lets your phone peek out. It also adds a sleek touch to the case's design. Protected from one side to the other. With the flip cover on the front and the case on the back, the Smart Clear View Cover surrounds your phone to protect it. It even fits snugly to secure the outer parts, such as the camera and buttons. Precisely driven. The S Pen has 4096-level pressure sensitivity, and the 0.7mm diameter tip provides a smooth and precise writing experience. With your Galaxy S21 Ultra 5G smartphone, just hang the pen on the phone's screen, click the S Pen button to launch the floating window command, and the S Pen can start writing or editing. Note: Before updating the phone's software, please disassemble the mobile phone case, after the mobile phone upgrade is complete, then install the mobile phone case. If you wear a mobile phone case to upgrade the phone system, it will cause the mobile phone case chip to not be able to adapt to the phone system, resulting in the mobile phone case not being able to be used. When the phone's NFC function is turned on, the protective cover can realize the mirror intelligent function and the automatic wake-up/closing screen function. Avoid the phone near metal objects, otherwise you may not be able to achieve the above functions. Note: Don't forget to disassemble the phone case before updating the system on your phone. It's good for your phone case. We appreciate your understanding and patience.