Sony MDR410LP Foldable Open-air Stereo Headphones (Discontinued by Manufacturer) Ferrite magnets for high energy in a modest size; help produce ample sound output - 105dB sensitivity 30mm speaker drivers with PET diaphragms ensure high rigidity for minimum distortion 5 single sided cord with gold-plated 3.5mm mini-plug Frequency response: 14Hz-22kHz Available in 3 colors: red, white or black