First and second electrodes and first and second electrical connection portions are overlapped and electrically connected. A water-soluble cellulose ether is used as a binder that is added to a cordierite-converted starting material. When the balloon is deflated the tip portion can be inserted into a body cavity, such as the rectum, to allow medication delivery through the holes in the tip portion. The layer of data pins are electrically connected to the signal layer, and the two layers of ground pins are electrically connected to the two ground layers, respectively. When an operation temperature of the CPU exceeds a predefined temperature, the comparator enables the electronic switch to be turned on, to reduce an operation frequency of the CPU.