Axess HPMV608-BK Professional headphones with microphone and volume control (Black) Single side cord, Lightweight materials to create a comfortable and easy to wear headphones, Single sided cord (7.5 ft.) Collapsible headphones for easy storage and mobility, Large soft ear pads for comfort and no sound leak Driver Units: 40mm; Frequency Range: 14Hz-20,000Hz Sensitivity: 115 dB (at 1KHz 1mw); I mpedance: 32 Ohms Jack: 3.5mm, nickel-plated