It's a remote control. I think it came with an iMac. There was also the OS X installation media. The box will be discarded and only the contents will be sent because the packaging size will be large. Below is a copy of the product description for "probably" the same remote control that was listed on Mercari. Apple Genuine Remote Apple Remote This remote control can be used with various Apple products, including Apple TV, iPod, and older MacBooks, iMacs, and Mac Minis. It is also ideal for the initial setup of Apple TV. Because it uses infrared communication, it seems to be compatible with older to relatively new models of Apple TV. * It will be shipped in simple packaging. * Operation has been confirmed before listing, but the remaining battery life of the built-in button battery (CR2032) cannot be guaranteed due to long-term storage. Please replace it if necessary.