Reliable Warranty - MillSO offers a 12-month unconditional Warranty for all our products to guard against any quality trouble or compatibility issue. You can extend it to 18 months by contacting MillSO 24-hour customer support team. We are more than happy to solve any problem for you!. Quadr-Layer Shielding: this 6.35 to 3.5 adapter perfectly combined tinned coppers, aluminum foil, soft and durable PVC covers, it's high-density shielding protection and effective isolation, offer a full and delicate tone, highly restored quality sound. Qualified 6.35mm Audio Adapter: 24K gold-plated connectors ensure high stability, high-speed lossless transmission; metal housing is a wear-resistant, anti-corrosion, and solid protection; tin-plated oxygen-free copper wiring for high fidelity, pure sound quality. Plug and Play: MillSO 1/4 to 3.5mm headphones adapter is very portable and has a quick response, tight connection, flexible convert a 6.35mm port to a 3.5mm port. (Please notice that the devices you use for should also have a stereo TRS jack. Transfer audio between devices, no mic.). MillSO 1/4"(6.35mm) female to 1/8"(3.5mm) male headphone adapter cable, for transferring audio between 3.5mm devices(smartphones, tablets or headphones) and 6.35mm devices(amplifier, guitar, piano, mixing console, home stereo system...). Eg: amplifier to headphones/3.5mm speaker adapter, 6.35mm headphone to computer adapter, piano to 3.5mm adapter, guitar to speaker adapter, etc.