The Xtream™ H4 Stereo Headset with Microphone are designed to prevent interruption in an open environment such as a call center, conference room, customer/tech support station, and clerk’s desk. The dual 3.5mm connectors work directly with your computer through the microphone and headphone input ports. The built-in omnidirectional microphone picks up sound reliably. The flexible shaft allows you to adjust the microphone’s position for optimal performance. Comfortable Fit & Wear The earcups and headband are adjustable to ensure the perfect fit, while the custom padding provides a soft comfortable fit. Built-in Microphone The built-in omnidirectional microphone picks up sound reliably. The flexible shaft allows you to adjust the microphone’s position for optimal performance. Volume Control Adjust the volume and mute the microphone easily with the conveniently located volume control. Dual 3.5 mm Connectors The dual 3.5mm connectors work directly with your computer through the microphone and headphone input ports. Specifications Connection: 3.5mm Audio Port Unit Driver: 40mm Impedance: 32ohms Frequency Response: 20 Hz to 20kHz Sensitivity: 105+-3db Cord Length: 6ft (1.8m) Microphone Directivity: Omnidirectional