Product 1: Extremely accurate and detailed sound with excellent transient response Product 1: Ultra-precise varimotion diaphragm for sparkling highs and deep bass, 10Hz - 39800Hz audio bandwidth Product 1: Revolutionary flat-wire voice coil provides higher sensitivity with improved impulse and treble response Product 1: Specially-shaped 3D-Form ear pads and padded genuine leather headband ensure a perfect fit for optimum performance and feel Product 2: Natural feel, perfect response - Universal sustain pedal with chrome foot pedal for a natural, realistic pedal action Product 2: Universal compatibility - Design with a conveniently located polarity switch for compatibility with all electronic keyboards Product 2: Robust reliable - Premium build with a robust, heavy-duty mechanism for uncompromised reliability Product 2: Made to move - Lightweight, ultra-compact aesthetic provides classic piano style sustain in portable footprint