The package is developed for the optional accessories of multi-air-conditioners for business-use with the circuit board exposed. In order to withstand vibrations and drop impacts, the heat sink part of the content is passed through the hole of the lower cardboard part and floated from the bottom of the box. In addition, the circuit board is protected with bubble wrap sheets, and a corrugated board designed to attach the circuit board is added to the upper cardboard. As a result, 28 percent of materials and 65 percent of the cost have been reduced.