4-channel headphones

Details 4-channel headphones 4-channel headphones

H - Electricity

04

R

181/2, 349/80, 1

H04R 5/033 (2006.01) H04M 1/05 (2006.01) H04R 1/10 (2006.01) H04R 5/02 (2006.01)

Patent

CA 1020873

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