The Cellhelmet Liquid Glass Screen Protection 50 is a transparent screen protector designed for use on phones or watches with glass screens. It is made of liquid glass material that strengthens glass on a molecular level, providing added protection against drops and scratches. The invisible nano coating ensures easy installation and a clear, smooth finish. This advanced screen protector is compatible with a universal range of devices and is a practical and effective solution for keeping your device's screen safe and scratch-free.