Description David Clark's newest ANR headset is based on the popular H10-13.4 with all of the reliability and comfort that made the 13.4 popular. Super Soft, Foam-Filled Pillow Headpad. Flo-Fit Gel Ear Seals Battery Power Supply Plus all the standard features and a universal flex boom with our exclusive M-7A Amplified Electret noise-canceling microphone XL comes with 9V battery pack and coil cord