An apparatus for communicating with a portable data carrier comprises a first communication interface, based on wireless data transfer technology, for receiving andor transmitting data via a first communication channel, and a second communication interface, based on different contactless data transfer technology, for receiving andor transmitting data via a second communication channel. It can suitably be used in articles such as encloses for electronic equipment such as communication devices. In this manner, each lug appears to have a curved \u201cbanana\u201d shape that extends across the width of the tire contact surface in a generally axial alignment. A plurality of wheels is provided to support transportability of the welding machine.