Highest resolution due to accurate and linear sound reproduction Comfortable padding design allows for extended use in long-wearing sessions Superior ambient noise attenuation in loud environments due to closed passive earcup construction The perfect companion for your daily work due to long-lasting materials and exchangeable cables with Sennheiser's established system connector What's in the box HD 300 PRO headphones cable (1.5m with 3.5mm jack) 1/4 " Adapter jack Quick start guide