Product introduction A new standard for stage use that was born to live the best performance . Has been developed for stage use , MDR-EX800ST is the inner ear monitor . Sony Music Studios who knows Sony and proud of the advanced technology of the world , the world of live is developed jointly . High-quality sound , of course , I am a durability to meet performance also hard . Product Description ◆ while earbud that promises a light performance artists to reproduce sound faithfully to hear in the studio , by the large-diameter 16mm dynamic driver unit , and achieve a natural frequency characteristics of the monitor speakers just like the recording studio . Resolution is excellent , I am suitable for monitoring . ◆ As with any monitor headphone MDR-CD900ST has gained high evaluation in the field of recording up to fully develop know-how of studio monitor headphones , Sony Music Studios and Sony jointly developed . Strict quality adjustment by elaborate hand , I am finishing reduce the individual differences of acoustic characteristics . ◆ I adopt a flexible ear hanger that can adjust the shape to fit the shape of the ear and durability wearability suitable for durability live a mounting made   suitable to live . Definite wearability is obtained . In addition , to achieve high input resistance of up to 500mW, and easy replacement of the code at the time of accident , the durability and functionality suitable for a live environment . / ■ Specifications ■ Model : caliber driver Sealed dynamic : - band frequency reproduction : - Sound Pressure level output 16Ω ( sensitivity )::: 500mW maximum input impedance 3 28000Hz 108dB Plug : 3.5mm stereo mini plug ( gold-plated L-type ) Code : about 1.6m weight : 7g accessories (excluding cable ) : earpiece (S, M, L), carrying case<br>