pay4save Newest Smart bluetooth watch For smartphone answer call SMS MP3 (Black Watch+Frosted Striped Strap) Thanks for your choosing to use the SBTW from our company.you can have a fully understanding of watch,know the usage and brief operation methods after reading the manual This device can only be used for the adaptive smartphones,which can synchronise the phonebook of the smartphones and provide a variety of practical functions and services,convenient for your to use when working and doing leisure activities. Company has the rights to modify any contents of the manual without any pre-notice. we donot do any other notice please.