Surfwheel Upgraded Version U8 Bluetooth Smart Watch Wrist Wrap Phone Mate Handsfree Call For ios Android iPhone 4 4s 5 5s 6 6 plus Samsung S3 S4 S5 Note3 Note4 Black 2.5D curved sapphire touchscreen,2.5D curved sapphire can be use as 120 M U disk It has become the high-end product's representive process in the mobile phone industry,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