AKG K-271 MKII Studio stereo headphone.
Closed,circumaural design,dynamic,rated impedance 55 ohms,max. input power 200 mW,frequency range 16-28.000 Hz,sensitivity 104dB/V,self-adjusting headband and auto-shut-off feature,single side jack,cable lenght 3m with 3,5mm stereo mini plug,incl. 5m coiled cable with 3,5mm stereo mini plug and 1 pair velvet pads,weight without cable 240g,incl. gold plated 1/8" to 1/4" screw-on adapter