Acoustic couplers; Cabinets for loudspeakers; Computer peripheral devices; Data processing apparatus; Data processing equipment, namely, couplers; Electric connections; Electronic regulating and control devices for the operation of light emitting diodes; Fire alarm and emergency evacuation devices, namely, fire alarm control panels, smoke detectors, heat detectors, alarm pull stations, audible and visible notification appliances, strobes, sirens, bells, horns, and speakers; Headphones; Microp...