Active noise-cancelling helps block background sounds for a more immersive listening experience. Transparency mode lets you quickly hear what's going on around you at the tap of a button, so you won't miss your platform being called.Unfold and goSwitching on the Beats Solo Pro is as simple as unfolding them. You can enjoy up to 22 hours of playback or up to 40 hours without noise-cancelling. Fold them to turn them off. At your assistanceA simple Hey Siri summons your voice assistant and lets you control your music, calls, volume, and more - without lifting a finger. Or a push of the b button will wake your assistant on other compatible devices.