Sennheiser OfficeRunner Convertible Wireless Office Headset with Microphone - DECT 6.0 (Classic Silver) OfficeRunner is the #1 wireless office headset with up to 400 feet of wireless range The OfficeRunner Wireless Office Headset is just 0.78 ounces, one of the lightest wireless office headsets on the market. It comes with an Over-the-Head attachment as well as 3 sizes of On-The-Ear style loops to make sure you find the style that best fits. Noise-canceling microphone for the clearest calls on a wireless office headset available Industry-leading 3-year warranty that also covers the battery - better than any Plantronics wireless headset 12 hour talk time means you can be hands free and see increased productivity all day long