Sentry Industries Inc. HO867 FatBoys Digital Headphones, Blue Full size studio-style headphones with soft on-the-ear ear pads Ideal for use with smartphones, cellphones, iPod, iPhone, MP3 player, tablets, PCs and laptops, DVD players, gaming and more Adjustable fitting headband Drive unit (diam.in mm) - Diameter 40mm; Frequency response: 20Hz - 20kHz; Impedance: 32 Ohms Tangle-proof two tone 4-feet long flat cord with 3.5mm plug