Features: 1) New product 2) In-line with mic switch and stylish volume control which can be used for stereo earphone to enjoy great music 3) External appearance: different color available 4) High sensitive condenser electric microphone 5) Compatible with various kinds of mobile phones 6) Driver diameter: 15mm 7) Frequency response: 20Hz - 20kHz 8) Impedence: 32Ω 9) Sensitivity: 105±5dB 10) Max. input power: 10mW Inner packing: Polybag or customized Outer packing: Carton