Sennheiser DW Pro 1 ML Wireless Office Headset Optimized for Microsoft Lync. Amazing range lets you walk and talk up to 400 feet from your phone Intelligent Fast Charge means you'll get up to 12 hours of talk time in a one-hour charge! You're covered with an industry-leading 2-year warranty Connects to your phone and PC at the same time, allowing you to seamlessly switch between phone calls, VoIP calls and voice dictation. You can even listen to music between calls! Adjustable noise-canceling microphone helps filter most unwanted background noise keeping your calls clear and professional