[ Alarm sensors; Computer keyboards; Connections, electric; Headphones; Instruments for measuring length; ] Loudspeakers [ ; Magnetic tape recorders; Magnetizers; Remote controls for air-conditioning apparatus; Remote controls for projectors; Scales; Teaching apparatus in the nature of a guard that is attached to the body of a woodwind instrument for music instruction; Teaching apparatus in the nature of hairdressing training heads; Telecommunications transmitters; Telephone receivers; Teleph...