Why is the screen on the top and not on the front?

Faced with the multitude of screens to which we are exposed on a daily basis, we wanted to offer a discreet hygrometer. Only a colored light comes on from time to time, to give you an indication of the quality of the air in your room. A blue or red light means that the air in your home is too dry or too humid. A green light indicates that the humidity level is optimal.