Headphones; Megaphones; Batteries, electric; Cabinets for loudspeakers; Cellular phones; Chargers for electric batteries; Mobile radios; Protective cases for smartphones; Sound recording apparatus; Sound transmitting apparatus; Speaking tubes; Telephone receivers

Batteries, electric; Cabinets for loudspeakers; Cellular phones; Chargers for electric batteries; Headphones; Megaphones; Mobile radios; Protective cases for smartphones; Sound recording apparatus; Sound transmitting apparatus; Speaking tubes; Telephone receivers