Abdominal belts containing built-in speakers for purposes of transmitting music/sounds/educational material to a fetus and built-in pockets in which to carry audio transmitters; Access control and alarm monitoring systems; Acoustic amplifiers for mobile devices; Adjustable smartphone and PC tablet stabilizers and mounts; Apparatus for recording, transmission, processing and reproduction of sound, images or data; Audio equipment for vehicles, namely, stereos, speakers, amplifiers, equalizers, ...