Brand Cosonic Model CT-890 Color Silver Material PU leather Interface Type 3.5mm length 2.2 M Impedance 32 ohm Sensitivity 120 dB Headphone Frequency Response 20~20000 Hz Microphone Frequency Response 30~16000Hz Features Drive unit: 40mm; Max. power: 30mW; Microphone frequency: 30~16000Hz; Fine and elegant workmanship; Microphone is rotatable assuring quality voice; Headband is retractable; Surface is made of leather soft and comfortable reducing head stress; With volume control; With anti cable winding design; Gold-plated plug reduces loss and impedance and improves lifetime; Great shield effect isolating external noise Packing List 1 x Headset