An operation mode selection image represents a first selection range of values of power consumption setting that are selectable in a first mode at the time of purchase of an air conditioner, a second selection range values of power consumption setting that are selectable in the first mode at a current time, a third selection range values of power consumption setting that are selectable in a second mode at the time of purchase of the air conditioner, and a fourth selection range values of power consumption setting that are selectable in the second mode at the current time. The relationship between the sizes of the first and second selection ranges and the relationship between the sizes of the third and fourth selection ranges represent a degree of decrease in the performance of the air conditioner over the period from the time of purchase to the current time.