Cameras; Earphones; Headphones; Microphones; Subwoofers; Accumulator boxes; Anti-glare glasses; Baby monitors; Battery boxes; Breathing apparatus for underwater swimming; Cabinets for loudspeakers; Car video recorders; Dictation machines; Digital book readers; Electronic access control systems for interlocking doors; Electronic book reader; Electronic educational apparatus, namely, communication blocks that manipulate and convey information electronically based on their arrangement and are us...