Acoustic conduits; Automatic pill counters; Calculating machines; Distance measuring apparatus; Earphones; Electric wires and cables; Hands-free kits for phones; Headphones; Horns for loudspeakers; Instruments for measuring length; Loud speaker systems; Loudspeakers; Microphones; Personal headphones for sound transmitting apparatuses; Solar batteries; Sound alarms; Sound transmitting apparatus; Speaker microphones; Telescopes; Range finders for cameras