Dual connectivity – offering both 3.5 mm jack and USB connectivity allowing connection to smartphones, tablets etc. as well as PC Optimized for Unified Communications – compatible with major UC and softphone brands Sennheiser Voice Clarity – wideband sound for a natural listening experience Noise-cancelling microphone – filters out ambient noise for optimum speech clarity Unique contemporary design – crafted with look and feel in mind Instant comfort – flexible headband with leatherette padding adjusts for perfect fit 2-in-1 ear pad styles – choose between soft leatherette or light acoustic foam for maximum comfort Optimized for communication and multi-media – with automatic sound enhancement profiles Ergonomic in-line call control unit – simple and functional for easy call management Bendable boom arm – ensures optimal microphone position Sennheiser ActiveGard® technology protects users from acoustic shock Protective carry pouch – for easy storage or transport Switchable Noise at Work limiter available when the headset is connected via USB