Design Confusion

The product i have chosen for this assignment is the humble guitar tuner. The guitar tuner that i have is small and compact and due to the minimization, multiple functions have been assigned to a single button. The mode and power button are one in the same, which means the user must press and hold the mode button for 3 seconds to either turn it on or off, there is no visual clue as to which this is needed to be done creating frustration. Also the pitch button can only increase in frequency it cannot decrease meaning the whole tuner must be turned off meaning you need to start all over again.