Cabinets for loudspeakers; Car video recorders; Earphones; Electronic collars to train animals; Headphones; Multimedia projectors; Self-timers; Smart rings; Smart watches; Smartglasses; Smartphone mounts; Sound reproduction apparatus; Transformers; Tripods for cameras; USB charging ports for use in vehicles; Vidicons; Virtual reality headsets; Audio-video receivers; Robots for personal, educational and hobby use and structural parts therefor