The invention provides a small-sized automatic analyzer being compact, enabling a large number of analysis items to be carried out, and having a high processing speed. The surface acoustic wave device includes a piezoelectric substrate, interdigital transducers formed on the piezoelectric substrate, and first and second reflectors disposed on the sides of the interdigital transducers. This allows the synchronization mechanism to accurately synchronize remote audio devices without requiring high precision clocks or other complicated solutions. The flexible locking elements are adapted to slidingly engage each other so as to secure the bases to each other while allowing the bases to move toward each other during compression of the spring. A second element having a second metal layer deposited thereon is provided, and the first metal layer is joined with the second metal layer. The auxiliary antenna is attached to the vehicle’s grille.