JBL says that their Everest Elite 750NC have "adaptive noise canceling that lets you control the level of ambient noise you want to let in or block out, through the My JBL Headphones App or the ear cup buttons.
Light and comfortable; Active Noise Cancellation, Ambient Awareness for when you need to hear noises around you while listening to your music; Vegan-friendly; Excellent sound even without equalization; The app allows you to personalize things; TruNote
You can only connect the headphones to one device at a time