A food wrap cutter includes a base body disposed under a slot on the front wall of a main body, a guiding element with elastic moving function disposed on the base body, and a guiding wedge of the two guiding elements coupled to a cam slot at a lower panel. The media is particularly advantageous in high temperature systems. Specifically disclosed are an adamantane derivative represented by the general formula below, a resin composition containing such an adamantane derivative, a sealing agent for electronic circuits and an optoelectronic member respectively using such a resin composition, and an adhesive of those. The GUI is configured to perform generating a display representing testing status of a plurality of DSG tunnels in a first frame and test results of the DSG tunnels in a second frame and providing details of a DSG tunnel test when selected by a user. A router is resigned in favor of a corresponding router at another server when the corresponding router has better connectivity to the device, where partial connectivity is better than no connectivity, and full connectivity is better than partial connectivity.