Megaphones; Microphones; Aeronautical radio communication machines and apparatus; Electric buzzers; Electric door bells; Electrical and electronic burglar alarms; Goggles for sports; Monopods used to take photographs by positioning a smartphone or camera beyond the normal range of the arm; Monopods for handheld digital electronic devices, namely, cell phones; Radio beacon machines and apparatus; Radio receivers and transmitters; Safety nets; Smoke detectors; Sound recording apparatus; Sound r...