Sony MDR-Q25LP Stay aware of outside sounds as you listen with Sony's MDR-Q25LP Open Air, Dynamic Headphones. Featuring an Active, Unique Design that eliminates the headband and provides superb listening comfort, these headphones offer consistent audio quality and minimum sound leakage. Additional features include Interchangeable Headphone Caps, a Neck Strap Built into a Cord Design, an Innovative Spring Action Earpiece, a 30 mm Driver Unit, and a Tangle-free Cord. Enjoy increased sensitivity and ultra-high definition sound with the MDR-Q25LP.