... parametersProducts: moving coil headphonesWear mode: head typeFunction purpose: bluetooth headset, wireless headset, voice headphonesUnit diameter: 40 mmFrequency response range: 20-20000 ... parametersAppearance design: white, purple, and blackOther features: 1, wireless bluetooth super receiving range 10-15 m;2, hd voice ... ;6, unique fashion appearance design. New fashion Bluetooth headset