Microsoft LifeChat LX-2000 Headset Email SKU: lx2000 Microsoft headset is both mobile and comfortable, and is easy to set-up —just plug it in. The behind-the-head design provides convenient comfort. Model No :LifeChat LX-2000. Ask a question Back to: Headphone/Headsets Description Foldable Design Headset folds and fits into the included carrying case, making it easy to take on the go. Behind-the-Head The behind-the-head design is comfortable and convenient. Inline Volume and Microphone Controls Make quick adjustments with the inline controls.