A1. 1)After receiving the package, please promptly unpack it and carefully inspect the screen for any visible physical damage such as cracks, scratches, or breakage. Tip:You can examine the anti-glare screen under different lighting conditions. 2)According to the item information provided in the USER GUIDE, thoroughly verify the quantity of the products received. If any accessories miss, please refrain from installing the GP0300 anti glare screen and contact JSAUX's customer support for assistance asap. 3)Please strictly follow JSAUX's installation tutorial for the anti-glare screen GP0300. Connect it to the Steam Deck as instructed, installation finished, power on the screen, and check the touch sensitivity and display to ensure proper functioning of the screen.