An apparatus includes first and second speakers, and an antenna including a first pair of wires connected to the first speaker, a second pair of wires connected to the second speaker, and a conductive sleeve surrounding portions of the first and second pairs of wires, the sleeve forming a coaxial capacitor with the first and second pairs of wires. A disclosed system uses a control speculation module to reorder instructions within an application program and preserve precise exceptions. The first trace includes a third edge substantially parallel to a fourth edge. The resulting radiation resistance of the low profile antenna is approximately three-times that of a double inverted-L antenna. At an inner periphery corner portion where an inner bottom surface and an inner periphery side surface of each of the recesses intersect with each other, a roundness portion for connecting the inner bottom surface with the inner periphery side surface by a smooth continuous curved surface are provided.