The Skull-iQ App provides extended features for the following Skullcandy products: - METHOD® 360 ANC - PUSH® ACTIVE - GRIND® - GRIND FUEL - CRUSHER ANC 2 - RAIL ANC - RAIL Unlock the full power of your product with the Skull-iQ® App. Customize your Skullcandy Skull-iQ-enabled headphones or earbuds with personalized sound, hands-free voice control, and greater controls to improve your listening experience! Keep your product up to date with firmware upgrades and take full control of your listening experience with tools like: Adjustable Hearing Modes: Fine-tune Active Noise Cancelling and Stay-Aware levels to suit your environment. Hands-Free Voice Control: Use your voice to activate Stay-Aware Mode, launch Spotify®, skip tracks, and more — all without lifting a finger. Personalized Sound: Take a quick hearing test and automatically tune your product to match your unique hearing profile. Customized Button Settings: Reassign button controls to match how you use your earbuds or headphones. Custom EQs: Choose from expertly tuned presets or create your own perfect sound signature. Each product includes a unique set of features—not every feature listed applies to every model, and there are even more features available that arent listed here.