Headsets used in racing for crew chiefs.
I know one model in made in Korea and the model number is H4000-01.

Company Name:Racing Radios International
Contact Person: Mr. Francois Theriault
Job Title: Director/CEO/General Manager
Address: 1014 De L'acadie, St-Antoine sur Richelieu, Quebec, Canada
Zip/Postal Code: J0L 1R0
Telephone: 1-514-946-5379
Fax: 1-450-787-2395
Website: http://racing-radios.com
Email:info@racing-radios.com

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