Hi, this watch is best and it has many hidden features which are not described and sound quality is also good. In U8 smart watch has good battery life. It has many useful functions, easy to navigate between them.look wa perfect and attractive. This watch is bluetooth 3.0 enabled for easy wireless syncing. I tried with many devices easily the Bluetooth connectivity support with all the mobile phone as well as iOS devices. Display quality is good. The smart watch features are make or answer calls, the sleep monitor etc. So I prefer you to buy the product. Thank you.