The monaural headphones have improved 1,575Â inch wideband bass speakers that provide powerful sound output for a real audio experience. The noise-canceling microphone eliminates distracting background noise for clear conversations. The flexible microphone arm allows you to place it in an optimal place that isn't too close or far from your mouth. The synthetic leather pad offers a comfortable fit while providing durability. The 0.138? and 0.098? audio pins are included for universal compatibility. The headphones are designed for mobile phones, tablets and computers and the large installed base of desktop phones. Headphones Spracht ZUM350M.