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; Adjustable smartphone and PC tablet stabilizers and mounts; Alarm installations and alarms; Apparatus for recording, transmission, processing and reproduction of sound, images or data; Downloadable smartphone software for heart rate monitoring; Smart watches; Smart cameras; Smart glasses; Smart home hubs comprised of voice-activated speakers, computer hardware, and downloadable software for controlling networked devices in the internet of things (IoT), operating internet-enabled and connected lighting apparatus and home security alarms; Smart rings; Smart televisions; Smartphones in the shape of a watch; Wearable activity trackers; Wearable computers in the nature of smartglasses; Wearable computers in the nature of smartwatches; Wearable electronic proximity sensors with embedded contact tracing software for {specify, e.g., monitoring and alerting of social distances, distance measuring, etc.} among wearers; Wireless headsets for smartphones; Wrist-mounted smartphones