Fanny Wang Headphones Co. Over Ear Active Noise Cancelling Headphones with Remote, Black, (FW-3001-BLK-BLK) (Discontinued by Manufacturer) 4 way active noise canceling up to 20dB & DuoJack: built in, in-line headphone splitter (patent pending) Built in 5 Watt solid state headphone powered Amp + 50mm dual plated drivers deliver the cleanest sound reproduction in its class Made for iPod touch (4th ,3rd and 2nd generation), iPod classic, iPod nano (6th, 5th and 4th generation), iPod shuffle (4th and 3rd generation), iPhone 4, iPhone 3GS, iPad (3G and Wifi) and iPad 2 (3G and Wifi). Selectable Bass Boost switches on 6dB of rich bone shaking bass Pass through circuitry allows operation with dead batteries