When you use a headphone or an earphone, there may be some occasions that the length of the cable is not long enough and an extension cable would be needed. However, there are no high-quality extension cables in the market, so you must accept the degradation of sound quality or limitation of listening position.
So we at Oyaide have desided to product high-quality 3.5mm female plug, J-3.5SR for pursuing sound quality of extansion cable.

The newly-developed 3.5mm female plug, J-3.5SR is produced pursuing sound quality and made of accurately machined copper alloy with silver + rhodium plating.

Outer Cover Copper alloy、Hard-chrome plating
Contact Copper alloy, silver + rhodium plating
Body Molded by glass filled resin