Applicable to: Compatible with Amazfit GTR 3 Pro Watch Only, not suitable for other watches. Anti-fingerprint and smudge-proof: The oil resistant coating on the screen protector surface can reduce fingerprints and smudge. BETTER THAN Tempered Glass and Thermoplastic Polyurethane: This screen protector uses the latest PPM material (PMMA, which is an alternative to glass) to protect the watch screen. Not only are impact resistant, but also soft and strong. Due to the characteristics of this material, if you bump into the edge it won't break like tempered glass. Additionally, Compared to the Traditional TPU material, it can better prevent the watch scratching due to its high strength. 100% Bubble-Free & 9 Hardness: 100% High Quality Bubble-Free Adhesives, Easy to Install and Remove. The hardness 9 glass screen protector with scratch-resistant coated surface resists sharp objects like knives and keys. This product will be an excellent pick for you.