The Califone Titanium HPK-1550 Headphones with Boom Microphone feature soft, comfortable ear cushions and a comfort strap designed for long wearability. The earcups offer high passive ambient noise rejection to effectively block external distractions and keep you on task. Dual 3.5mm plugs allow you to attach each one separately, and the product comes with a detachable 6' cord. With 40mm neodymium drivers, these Califone Headphones have an impedance of 50 ohms and a frequency response of 20Hz to 20kHz. In-line volume control allows you to maintain volume levels that are comfortable for you. With a rugged construction, these headphones with microphone contain protective slotted baffles and an adjustable headstrap.