Acoustic conduits; Acoustic couplers; Apparatus for recording, transmission, processing and reproduction of sound, images or data; Audio-video receivers; Automatic indicators of low pressure in vehicle tyres; Burglar alarms; Cabinets for loudspeakers; Electric navigational instruments; Horns for loudspeakers; Navigation apparatus for vehicles; Photographic cameras; Radar apparatus; Satellite navigational system, namely, a global positioning system (GPS); Sonars; Speed indicators