Section 16 Machinery and mechanical appliances; electrical equipment; parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers and parts and accessories of such articles 85 Electrical machinery and equipment and parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles 85 18 Microphones; loudspeakers; headphones...; electric amplifiers... 85 18 40 Used as repeaters in line telephony 85 18 40 20 Used as repeaters in line telephony Commodity Code Description 85 18 40 20 00 Used as repeaters in line telephony