Brand Cosonic Model CT-650 Color White + grey + white Material Plastic Interface Type 3.5mm length 1.9 M Impedance 32 ohm Sensitivity 120 dB Headphone Frequency Response 20~20000 Hz Microphone Frequency Response 30~16000Hz Features Speaker diameter: 40mm Max. Power: 30mW; Seal of the secret type design can effectively prevent the voice scattered and separates the noises outside interference; Provide appropriate and elastic structure can adjust the cow with design; Rotary high sensitive microphones sound pickup more clearly Packing List 1 x Headphone