MillSO 1/8 to 1/4 adapter is a 3.5mm Female jack into a 6.35mm Male plug adapter, for connecting smartphones, tablets, MP3, or headphones with standard 3.5mm plugs to audio devices with a 6.35mm stereo jack. Eg: piano keyboard to headphones adapter, guitar amp to speaker adapter, amplifier to headphones adapter, amplifier to speaker adapter, 6.35mm headphone to computer adapter, mixing console to speaker adapter... | 300cm-More-Length: 300cm durable and premium soft PVC jacket extension cable trends to create more available space between two connected devices. MillSO 1/4 to 1/8 headphone 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.) | Qualified Audio Adapter: MillSO 3.5mm to 1/4 headphone adapter, with 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. Standard 3.5mm jack and 6.35mm plug have outstanding compatibility which connects your devices firmly and ensures you enjoy wonderful music. | Quadruple shielding: this 6.35mm to 3.5mm 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.