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system : android os gps : no type : on wrist compatibility : all compatible rom : 128mb function : passometer function : fitness tracker function : sleep tracker function : message reminder function : call reminder function : answer call function : dial call function : push message function : big three needles function : 24 hour instruction function : chronograph function : alarm clock function : small second function : world time function : permanent calendar function : power reserve function : week function : speed measurement function : month function : heart rate tracker function : interactive music function