You can quickly and easily apply the PanzerGlass Ultrasonic Fingerprint Glass Samsung S21 Screen Protector onto your screen. This screen protector sticks itself to your screen. You just have to put it on your Samsung and it sucks itself into place without leaving any air bubbles. The screen protector protects your smartphone from scratches and dents. Thanks to the thin layer of tempered glass, you can safely put your smartphone in the same pocket as your keys. The antibacterial technology on the screen protector ensures that bacteria won't multiply. This prevents stains and keeps your screen protector clean. This case friendly screen protector doesn't extend all the way to the edges of your screen. This prevents your phone case from pushing the screen protector off your screen. The PanzerGlass Ultrasonic Fingerprint Glass Samsung S21 Screen Protector Black doesn't affect the operation of the fingerprint scanner.