Item Type: MMCX Earbuds Interface: MMCX Frequency Response Range: 20-20KHz Impedance: 12Ω Sensitivity: 103dB At 1KHZ Distortion Rate: 1% Speaker Diameter: Approx. 9mm/0.4in Shell Material: Metal Suitable For Headphones With MMCX Interface, Such As for SE215 SE315 SE425 SE535 SE846, for UE900, for TK200 T100, for W10 W20 W30 W40 W50 W60 W80, for ES10 ES20 ES30 ES50 ES60, for UM PRO10 UM PRO20 UM PRO30 UM PRO50, for AM PRO10 AM PRO20 AM PRO30, for XBA A3 XBA A2 XBA H3 XBA H2 HA FX850, Etc. 1、RANGE OF APPLICATION: MMCX earbuds are suitable for headphones with MMCX interface, such as for SE215 SE315 SE425 SE535 SE846, for UE900, for TK200 T100, for W10 W20 W30 W40 W50 W60 W80, for ES10 ES20 ES30 ES50 ES60, etc.  2、9MM LARGE DYNAMIC COIL: Dynamic drive bass earphone with a large 9mm dynamic coil gives you excellent sound quality, stability and the ability to play powerful bass so you can clearly hear a wider range of sounds. Note: no cables.  3、HIFI SOUND QUALITY: Deep HiFi bass earphone has hifi sound quality with only 1% distortion, giving you lossless perfect sound quality, balanced air vent and master tuning for clear, noise free sound.  4、PERFECT FOR YOU: MMCX earbuds connect to the MMCX Bluetooth receiver or adapter to convert to fully wireless headphones with perfect sound quality. If you are a wired person, connect them to the MMCX cable to make them wired headphones.  5、NOISE ISOLATION: MMCX earphone blocks ambient noise to create a quiet space and experience immersive sound. Stable and comfortable for long wear without pain, lightweight design, noise reduction and noise isolation. 6、METAL HOUSING: HiFi MMCX earbuds shell is made of metal with a unique texture. Wiring terminals are also gold plated to minimize sound attenuation caused by conversion and ensure stable connection.