The ATH-E40 features specially designed housings that provide incredible isolation. The isolation – and the comfort – are enhanced by the four sizes of included silicone ear tips (XS/S/M/L), which allow you to create a custom fit. The headphones also come with a detachable 1.6 m (5.2') cable, with newly developed A2DC (Audio Designed Detachable Coaxial) connectors at the headphones and a 3.5 mm (1/8") stereo mini-plug output, and a carrying case.