A wireless keyboard with a built-in web camera, which allows a user to input text data and image data without being locally restricted by a wired connection to the computer. The beverage container holding device includes a body member being designed for holding the beverage container. The slide rail assembly is attached to and runs horizontally along a body of the vehicle or machine and supports a slidable carriage. The method may further include testing the semiconductor structure using the tester. Therefore, the user grips the gripping portion instead of the hook member, and this may prevent the user from being hurt accidentally by the object hung on the hook member.