It is an additional charge when renting PowerRay for 1 day or more.
Addition of PowerRay rental days
It will be added to the rental fee on the day. In the case of 1 night and 2 days, "1 day" will be added. In the case of 2 nights and 3 days, "2 days" will be added. You can add up to 6 nights and 7 days ("6 days").