An adjustable desk is disclosed, which has a desk board and two supporting legs; each supporting leg includes an upper frame, a lower frame, and fasteners. Therefore, it is particularly useful to select different tools for stone chamfering operation according to practical needs. The NFC-enabled mobile communication terminal includes an NFC antenna for transmitting and receiving data recorded in the tag, an NFC controller for receiving the data the NFC antenna, a function control unit for receiving the data from the NFC controller and analyzing the data, and a terminal control unit for causing at least one function of the mobile communication terminal to be performed. The intragastric devices may reshape the stomach cavity, such as by pushing on opposite sides so as to \u201cplanarize\u201d the stomach. The riser card described herein provides Plug-and-Play functionality so that an operating system controlling the electronic system in which the riser card is included can load the appropriate driver software thereby simplifying operation of the electronic system.