yamay smart watch, watches for men women fitness tracker blood pressure monitor blood oxygen meter heart rate monitor ip68 waterproof, smartwatch compatible with iphone samsung android phones (black) yamay <b>tips: please follow steps below to keep a comfortable and skin friend friendly wearing experience.</b><br> 1. please clean the watch regularlly, and keep it clean and dry when wearing.<br> 2. please don't wear the watch too tight or wear it for a long time, so your wrist skin can breath well and feel comfortable. <p> package include:1 x yamay smart watch; 1 x charging cable; 1 x user's manual