OBlanc Shell NC3 2.1 channel - 40mm for subwoofers and 30mm for left/right channels with AMP

OBlanc Shell NC3 2.1 channel - 40mm for subwoofers and 30mm for left/right channels with AMP Retail Box 1 year Limited Warranty Alternate Description OBlanc SHELL 2.1 Headphones Treble and Subwoofer Dual Drivers in each Ear Cup, State-of-the-art Listening Experience for Gamers Product Overview The OBlanc SHELL 2.1 Headphones with Treble and Subwoofer Dual Drivers in each Ear Cup takes your movies, music , gaming and entertainment to a whole new level. The built-in rechargeable battery powers amplified subwoofer in each ear cup improves vocals, and deeper bass provides you with a fuller, cleaner theatre sound that you can feel. It is more than you can desire for a  State-of-the-art Listening Experience. Features 2.1 Amplified Stereo Channel with Independent Bass Gold Plated 3.5mm 4-pole Connector Compatible with Smartphones, and Tablets Extreme Comfort and Fit Leatherette Ear Cups 2 Neodymium Drivers In Each Ear Cup: -30mm 32 for Treble  -40mm 32 for Bass Volume Controls: (Can be Adjusted Individually) -Main Volume -Bass Volume Tangle-free Cord with In-line Microphone and Call Control Rechargeable 450mAh Battery (Up to 10 Hours Per Charge) Acoustic Design: Dynamic, Closed-back Specifications Acoustic Design: Dynamic, Closed-back Frequency Response: 20 - 20KHz Speaker Sensitivity: 116dB SPL (1mW) @ 1KHz Total Harmonic Distortion (THD):