Description of Skullcandy Skullcrushers Headphones If a shock-and-awe level of bass has been missing from your life, look no further. Stereo speakers PLUS mini-subwoofers in each ear of the Skullcrusher let you take the club with you on the road. Those pesky voices in your head will never know what hit 'em! Features: 30mm neodymium magnet speakers 30mm vibration speaker Vibration unit: 100hz Frequency response: 20-20K Hz Impedance: 32 ohms Sensitivity: 99db In-line vibration level adjustment and on/off switch Cable length: 1.3M Plug type: 3.5mm gold plated & 6.3mm adapter