Tempered Glass Screen Protector 40mm [2 Pack],WERONE 3D Full Coverage, HD Anti-Bubble, Anti-Scratch Compatible for iWatch Series 4 (Black) Waterproof functionsupport waterproofing, the water will not seeps through the screen protector, you can swim in it. High sensitivityThe screen adhere to the watch face, the sensitivity of the screen is NOT diminished. 3D Full-coverageScreen protector edge to edge coverage, it provides maximum protection. Specially designed for apple watch 40mm. 9H HARDNESS9H Hardness tempered glass Screen protector offers protection from scratch, crash, shock-resistant of the apple watch. One year warranty unconditionally refund or free replace if defective or any quality problems, life-time friendly customer service.