Ref-Comm World Cup Headset
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Assistant referee Anu Jokela talks into her headset during warmups before a Women's World Cup match between France and Germany Stock Photo - Alamy
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Referee Viktor Kassai (Hungary) talks into his headset during warmups before a FIFA World Cup match between Ghana and the USA Stock Photo - Alamy
Sports referees: how to choose and use your micro earphones?
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