Audio- and video-receivers; Covers for smartphones; Earphones; Fitted plastic films known as skins for covering and protecting electronic apparatus, namely, mobile phones; Headphones; Interfaces for computers; Loudspeakers; Microphones; Mobile telephones; Protective films adapted for smartphones; Slide projectors; Sound transmitting apparatus; Wearable activity trackers; Acoustic membranes; Cabinets for loudspeakers; Transparency projection apparatus