Persona u8 blooth smart watch is a very smart product for all smartphone user. its price is so low and in range for all user. any user can use it easyly. its touch is so smooth and style is better than any other digital watch or anolog watch and easy for use. when any user put it into his wrist he can look so smart. and its black colour is better than any colour. charge and standby time is 1day. I cant understand in a small device like this smart watch how can give all this features like a smartphone.