ED9-- a bit extreme to define new flagship headset, a patented variable tuning device (patent number: ZL201120401183.6) Built-in T-cells (patent number: ZL201420488834.7), a number of technology integration is bound to once again shake the traditional moving coil units in the field. It will give you a new hearing texture, toothless sound, and the sound knot like feeling extremely rich. Whether it is two-unit, three units or headphones, they can not exhibit ED9 knot like texture in terms of the overall sound. More Details: Specifications: General Specification Brand Name KZ Model Number ED9 Color Silver Cable Length 1.2 M(±3CM) Wearing Type In-ear Net Weight (g) 24g Technical Parameters Connector 3.5mm Microphone No Output Power 2mw Impedance 16 ohm Frequency Response 7-46200hz Compatible With Mobile Phones\/ computers\/ mp3\/ mp4\/ tablet PC Use location listening, DJ, sports Style positioning symphony, rock, European and American pop, dance and so on Package Included: 1X In-ear Headphone 1 X Earphone Box