Walkie-talkies; Acoustic conduits; Answering machines; Apparatus for transmission of communication; Battery chargers; Cabinets for loudspeakers; Earphones; Electrical outlet plates; Electrical outlets; Electro-dynamic apparatus for the remote control of signals; Headsets for mobile telephones; Radio pagers; Radiotelephony sets; Smoke detectors; Telephone transmitters; Wireless headsets for smartphones; Wireless transmitters and receivers