. "With the 1/8in. to 1/4in. (3.5mm-to-6.3mm) jack adapter, connect the Sennheiser DJs HD202 II to the 1/4in. (6.3mm) phone jack on your high fidelity system or to the 1/8in. (3.5mm) headphone jack on your TV set, VCR or other video devices." . . . .