1. It is used to transmit audio and tune between 3.5mm devices (smartphone, tablet, MP3 or earphone) and 6.35mm devices (amplifier, guitar, piano, sound console, home stereo system...). For example: 3.5mm headphone to amplifier adapter, 6.35mm headphone to computer adapter, piano to 3.5mm adapter, guitar to 3.5mm speaker adapter, etc.2. The copper gold-plated connector has good contact performance, reduces transmission loss, and ensures clear stereo audio transmission.3. The all-copper conductor core provides superior conductivity, effectively reduces noise and interference, and transmits high-fidelity audio signals.4. The outer layer is made of cotton braided mesh, which is beautiful and resistant to pulling.5. 0.5m, 1m, 2m, 3m and multiple lengths are available.