Optimized for major softphone brands - with integrated 0 control and USB connector Sennheiser voice clarity - wideband sound for a natural listening experience Ultra noise canceling microphone for perfect speech transmission Sound-enhancement profiles - perfect for communication and music Dual-sided high-quality neodymium speakers for outstanding high definition stereo sound Optimized for major softphone brands - with integrated 0 control and USB connector Sennheiser voice clarity - wideband sound for a natural listening experience