The iron TTR Over-Ear Noise Cancelling Headphones from House of Marley feature active noise cancelling provided by the 2 included AAA batteries. They are designed for playing back music and taking calls on your portable device. The 4-foot braided tangle-free cable has an in-line mic that will work with most smartphones and a 3-button remote for controlling track and volume control on iOS devices. The TTR headphones have a leather-covered adjustable inner headband and leather ear cushions for a comfortable fit. The included carry case allows you to safely transport and store your TTR headphones when not in use.