[Support ultrasonic fingerprint]-Ultra-thin film does not interfere with touch response and fingerprint ID in the screen. Advanced nano-glue and full-adhesive covering function make it have excellent touch sensitivity, and interact with ultrasonic sensor to make the display fingerprint sensor function play a role. ! ! ! Please register your fingerprint before pasting the screen saver. [Private Protection]-The screen is only visible to the person directly in front of the screen, and it is the best tool for you to effectively protect personal and sensitive information. The privacy screen will be dimmed to prevent people nearby from peeking at you, so you should increase the display brightness of the device when using it. [4 Pack]-2 sets of Samsung Galaxy S21 ultra-flexible privacy screen case+2 sets of Samsung Galaxy S21 super camera glass case. They are case-friendly, and case providers provide maximum protection for your phone. (! ! ! Remember settings-touch sensitivity-and turn on touch sensitivity) [Support in-screen fingerprint ID ] ultra-thin film does not interfere with touch response and in-screen fingerprint ID. Advanced nano-glue and full-adhesive covering function make it have excellent touch sensitivity, and interact with ultrasonic sensor to make the display fingerprint sensor function play a role. Please register your fingerprint before pasting the screen saver. [Upgraded version ] optimizing and upgrading the previous products, the design of Samsung Galaxy S21 super-advanced soft TPU (flexible film) is more durable and scratch-resistant than before. 0.22 mm thick, with self-healing characteristics, which can make the film recover from minor scratches.