We are specializing in various kinds of headphone, earphone, and microphohe. Good quality, fashion design with resonable price. Hign quality stereo headphone with high sensitive condenser microphone Headband in height adjustable Idea for Internet telephone, gaming and voice recognition software Specification: Diameter: 40mm Connector: 3.5mm stereo plug Cord Length: 2.5 Single Frequency Response: 20-20,000Hz Impedance: 32 Ohms Sensitivity: 105db/mv Reted Power: 100mv Pow Handing Capacity: 1000MV