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; Telephone transmitters; Computer mice; Educational apparatus, namely, manipulative blocks used as teaching aids for the visualization of math concepts; Electric buzzers; Electric navigational instruments; Electric light dimmers; Electrical plugs and sockets; Electro-dynamic apparatus for the remote control of signals; Fire alarms; Laboratory instruments, namely, radiation devices in the nature of ultraviolet, visible, or infra-red light boxes for the analysis of bodily fluids; Loud speakers; Mechanical remote controls for motors; Smoke alarms; Sound alarms; Tool measuring instruments; Wireless speakers