FEATURES: Electro Bass Booster Tight bass with Beat Response Control Advanced Direct Vibe Structure balanced bass High sensitivity for a loud, clear sound Dynamic Neodymium drivers deliver precise sound Wide frequency response for a full range of sound One button control of smartphones Easy wireless streaming with Bluetooth One－touch listening to play instant music with NFC technology. Swivel folding design for travel Pressure relieving ear pads seal in sound Can also listen with supplied audio cable Up to 20 hours of battery life. 1000mW an OFC voice coil provides high power handling of 1000 mW for continuously punchy bass. 3Hz With a low end of 3 Hz, these headphones reproduce pounding sub－bass rhythms