Alienvibes Bass Boost Active Noise Cancellation Headphones (I-EP03-BK) Enlarged, 53mm high definition acoustic drivers deliver pounding and exhilarating bass Active Noise Cancellation delivers clear and fulfilling audio free from external distractions Soft, luxurious ear cushions make long listening sessions relaxing and comfortable Audio Pass Through: Listen in both active and passive mode and experience great sounding audio with or without batteries Built-in microphone allows for hands-free phone calls without touching phone or music device Includes carrying case with microfiber cleaning cloth, two detachable 3.5mm audio cables (one with mic & remote for smartphones & tablets), airplane stereo plug, 1/8 to 1/4 inch stereo adapter and 2 x AAA batteries.