Equation Audio RP-15MC Headphones, Foldable, Neodymium Dynamic Type: Neodymium Dynamic Driver: 38mm Impedance: 32 Ohms +/- 15% Sensitivity: 102dB +/- 3dB @ 1kHz Connector: 3.5mm (1/8 inch Gold Plated), 6.3mm (1/4 inch) Adapter