Monster Turbine PRO High-Performance In-Ear Speakers (Gold) (Discontinued by Manufacturer) Model No. MH TRB-P IE GLD Pro speaker design with low mass, ultra-wide bandwidth driver for superior accuracy All-metal construction cancels unwanted resonance for pure sound Pro Sound Supertip with advanced construction provides maximum sound isolation. Pro strain relief This item is non-returnable. Pro speaker design with low mass, ultra-wide bandwidth driver for superior accuracy. All-metal construction cancels unwanted resonance for pure sound. Pro Sound SupertipTM with advanced construction provides maximum sound isolation. Pro strain relief; rugged construction withstands heavy duty use. MicroStrand conductors with ultra-low impededence for subtle detail and clear audio reproduction.