Using your Audio - Technica ATH - M40x headphones is easy. First, connect the cable to your audio device. You can choose between the coiled and straight cable depending on your needs. Put on the headphones, adjust the headband for a comfortable fit, and enjoy high - quality audio. When using them for one - ear monitoring, simply swivel the earcup 90°. For storage, collapse the headphones to save space. As for maintenance, keep the earpads clean by gently wiping them with a soft, dry cloth. Avoid getting the headphones wet. Also, when not in use, store them in the protective carrying pouch to prevent damage. Don't expose the headphones to extreme temperatures or humidity. If you need to replace the cable, make sure to use a compatible one.