●Barrier: Simply apply to form a 9H hardness glass film to prevent cracks and scratches of the LCD screen ●You can install more than 10 smartphones or tablets. Can also be used for car navigation systems and car audio screens ●Highly durable glass film using professional grade automotive glass coating technology. Once applied it is permanent ●Blue light cut formula not only protects the screen but also gentle on the eyes, making the screen glide smoothly and more maneuverable ●Package Contents: Capacity: 0.2 fl oz (5 ml); Accessories: Installation manual (English language not guaranteed), 1 cloth