Revesun Black Luxury U8 Bluetooth Smart Watch Wrist Watch Phone with Camera Touch Screen for IOS Android /Apple Iphone/Android Smartphone/Samsung Smartphone 2.5D curved sapphire touchscreen,2.5D curved sapphire can be use as 120 M U disk you feel is soft and smooth transition TPSiv safe and anti-allergic watch strap Battery with high voltage of 4.35V lithium ion polymer and high-capacity,208 hours of standby time,6 hours of talk time Case material:Stainless Steel