Loudspeakers; Smartglasses; Smartwatches; Adapter plugs; Audio-receivers and video-receivers; Audio-video receivers; Batteries, electric; Battery chargers; Cabinets for loudspeakers; Cases adapted for mobile phones; Earphones and headphones; Electrical connections; Electrical plugs and sockets; Loudspeaker cabinets; Microphones; Plug adaptors; Plug connectors; Rechargeable electric batteries; Remote control telemetering machines and apparatus; Transmitters of electronic signals; Wearable acti...