A vacuum cleaner that includes an upright main body, an upright fan motor generating a suction force, and a wheel assembly that is mounted on the upright main body and guides movement and rotation of the upright main body. The channel region is located between two current terminal regions, which in one example serve as the sourcedrain regions. The tag includes the name and telephone number, etc. By the feature of the Lipiodol that stays in liver tumors for a long period, the radioactive mixture is applied to treat liver cancers by injection so that injuries caused by surgical operations can be prevented. The first end of the optical fiber is polished so as to be flush with the first end of the stub. In particular, the gold stud assembly is utilized to attach the antenna to the substrate, thereby providing a predetermined air gap therebetween.