Oblanc OG-AUD63055 NC3 On-Ear 2.1 Headphone with In-line Microphone - Matte Black 2.1 Amplified Stereo Channel with Independent Bass; 2 Neodymium Drivers In Each Ear Cup: 30mm 32 for Treble, 40mm 32 for Bass In-line Microphone with Call Control and Tangle-free Cord Gold Plated 3.5mm Jack 4-pole Connector (Compatible with Smartphones, and Tablets) Extreme Comfort Leatherette Earcups Acoustic Design: Dynamic, Closed-back