Aerials; Batteries, electric; Cabinets for loudspeakers; Chargers for electric batteries; Earphones; Electric transformers; Headphones; Headsets for mobile telephones; Horns for loudspeakers; Integrated circuits; Modems; Power adapters; Power supplies; Rechargeable batteries; Smartglasses; Subwoofers; Transmitters of electronic signals; Transponders; Wearable activity trackers; Wireless headsets for smartphones