Sound Quality: Lightning Sound + Power RockStar is compatible with the entire line of Lightning Audio headphones and offers lossless output up to 24bit 48kHz. DUAL PURPOSE: Your iPhone or iPad can run at peak efficiency with 12W pass-through charging. You can therefore charge anywhere while using navigation, watching videos, listening to music, or making calls. ROCK ON: In order to provide superior noise cancellation without requiring batteries or an additional power source, RockStar will also support the higher power delivery needed by professional or high-end headphones that use a lightning cable. VERY PORTABLE: This adapter's small size and robust design make it simple to carry around; simply throw it in your bag and head out.