Cabinets for loudspeakers; Camcorders; Covers for smartphones; Earphones; Headphones; Microphones; Protective films adapted for smartphones; Self-timers; Slide or photograph projection apparatus; Smart rings; Smartglasses; Smartwatches; Speaking tubes; Sunglasses; Telephone apparatus; Transmitters of electronic signals; Video baby monitors; Virtual reality headsets; Wireless headsets for smartphones; Electric door bells; Monopods for cameras