BS EN 60958-4-4:2016

Electric - A general term for the flow of electric charge

Digital - A system that uses only 0s and 1s to transmit data

Physical - Used to describe strength or visual properties of an item

Audio - Also known as sound. An audible vibration wave which can be heard.

professional - A term used to describe products or people which may be focused on specialist educational training

Electrical - Something that requires electricity to work.

Equipment - A product or good that is tactile.

Professional - A person that is trained within a profession.

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