Smartphones; tablet computers; computer programmes, recorded; computer software applications, downloadable; digital signal processors; central processing units for processing information, data, sound or images; computer software for controlling the operation of audio and video devices; computer chatbot software for simulating conversations; computer software for organizing and viewing digital images and photographs; computer software for creating and editing music and sounds; wearable activity trackers; cabinets for loudspeakers; headphones; headsets; virtual reality headsets; loudspeakers; portable media players; sound transmitting apparatus; electronic sheet music, downloadable; wearable computers; telecommunication apparatus in the form of jewelry; selfie sticks for use with smartphones; wearable video display monitors; selfie lenses; sound reproduction apparatus; megaphones; audio interfaces; equalizers [audio apparatus]; electronic sounding device within books, namely, audio devices for audiobooks; audio transmitter units; software to control and improve audio equipment sound quality; computer software for processing digital music files.