Beyerdynamic Custom One Pro Black (Discontinued by Manufacturer) Custom Sound Slider to change the sound anytime (closed, semi open, open design) Customizable Style: easily change color of the headband, ear pads, ear cups plates design, detachable cable... Crazy or Cool  Style and look! New Velocity Drivers at 16 ohm, suitable for smart phone, ipad, tablets, home audio or pro audio devices Variable Noise Reduction, adjust the Sound Slider for deeper bass and block out noises, or adjust to hear just a little ouside sound, you design it! Quality. Made in Germany. Two year warranty by beyerdynamic USA