1. We are a professional headphone manufacturer, the office is in Shenzhen and factory is in Baise City, GuangxiProvince2. We can customize different styles of headphones according to your specific requirements, use white/black magnets with differenteffects, real/fake copper ring speakers, with MIC and without MIC, and replace buttons of different styles.3. Our factory produces various styles of headsets for more than 5 years, likes game headsets, aviation headsets, custom madevarious styles of headphones. If you have more requirements, please contact the customer serviceThank you.!SpecificationsHeadphonesDrive unite: 14mmFrequency rang: 20-20000hzSensitivity: 96±3 dBImpedance: 16ΩCable length: 1.2mMax input power: 15±3mwJack: 3.5mm and Type-cMicrophoneFrequency rang: 20-16000HZSensitivity: -52 dBImpedance: 2kΩ