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