Chronographs [time recording apparatus]; clocks [time recording apparatus]; radios; cassette players; DVD players; insert earphones; transformers [electricity]; electric door bells.

Calculators; Earphones; Headphones; Loudspeakers; Megaphones; Microphones; Radios; Acoustic couplers; Cabinets for loudspeakers; DVD players; Portable media players

Acoustic couplers; Cabinets for loudspeakers; Calculators; DVD players; Earphones; Headphones; Megaphones; Portable media players; Radios