iAudio is a tool application used with portable devices (smart watches, smart screens, smart headphone compartments, etc.), including but not limited to models (T802, G303C, etc.). The APP can be used to integrate some related functions of the mobile phone. Functions: Answer/hang up calls, send and receive text messages, view contact information, application message notifications, mobile phone time/date and other information and services provided by the APP: dials, pictures and other files are synchronized to the device for operation and display. And it can be linked with the functions provided by the device (EQ settings, device search, key response, screen display, etc.).