How to add days or unlimited hours on cupertinoTimerPicker?

Question

How to add days or unlimited hours to CupertinoTimerPicker? or Is that any way to add hours and minutes without using CupertinoTimerPicker

  Widget time() {
    return CupertinoTimerPicker(
      mode: CupertinoTimerPickerMode.hm,
      minuteInterval: 1,
      secondInterval: 1,
      initialTimerDuration: initialtimer,
      onTimerDurationChanged: (Duration changedtimer) {
        setState(() {
          initialtimer = changedtimer;
        });
      },
    );
  }