micro-computers; head-mounted video display apparatus; microphones; face shields for protective helmets; safety helmets; electronic burglar alarms; smartwatches; rearview cameras for vehicles; webcams; loudspeakers; chargers for batteries; solar panels for production of electricity; digital photo frames; wearable computers; navigational instruments; electronic navigational and positioning apparatus and instruments; event recorders; car video recorders; digital signage display panels; electronic touch screen displays; electronic display instruments