A speaker includes a frame, a sound radiating surface, and a suspension that couples the sound radiating surface to the frame. The main body includes a coupling strip with actuating and hook ends and a projection that is disposed within the main body, and a side wall with a slot. Data representing the identities of the selected nodes or of the defined geographical area is then provided to authorised receivers, for example via a Smart Card or the Internet. The processing wheel can be configured to adjust the path along which the processing stations orbit as the processing wheel rotates around the rotation axis. The polymer has more than one primary amino group per hydrolyzable silyl group, affording an increased number of reaction sites with organic resins and forming a firm bond therewith.