[ 3D spectacles; ] Audio-receivers and video-receivers; [ Burglar alarms; Electric door bells; Electronic collars to train animals; Flip covers for smart phones; Headphones; Loudspeaker cabinets; ] Portable media players; [ Satellite navigational system, namely, a global positioning system (GPS); Self-timers; ] Sound recording apparatus; Tape recorders; [ Video baby monitors; ] Video cameras; Video recorders [; Video monitors; Wearable activity trackers; Cases for mobile phones ]