1,High quality stereo ,sounds like in a music hall 2,Headphone diameter:30mm 3,20-20000hz 4,Power:125mw

1,High quality stereo ,sounds like in a music hall2,Headphone diameter:30mm3,20-20000hz4,Power:125mw5,Power capacity:0-250mw6,Sensibility:110+/-5db7,Voltage:179-500mV8,Cable length:125m9,Plug :Stereo Φ3.5mm

Cotton Hat Headphone