A cooler comprising a container having a container bottom wall and upstanding side walls standing upwardly from a periphery of the bottom wall and defining an open top and a cover wall hingedly connected to one of the side walls and attachable to at least one other of the side walls so as to close the open top. A listening channel may be opened between a service and a service bus in a cloud computing environment. A microcontroller of the interface receives sensor detection information from the sensor in response to the sensor receiving the DC power from the power converter. A first RTP session is established between the Media Gateway and the first Media Server, and then a PROMPT AND COLLECT message is sent from the Application Server to the first Media Server to gather data from the caller for establishing the Enterprise conferencing. The commands perform standard features of the operation system which are not normally allowable by traditional FTP. The image display apparatus includes: a control section which generates color image data to be displayed by assigning data of a monochrome image to color data of R, G, and B; and a color display section which is capable of displaying the monochrome image based on the color image data to be displayed.