FREE 5-YEAR WARRANTY AND UNLIMITED SUPPORT – That’s 5 times the warranty of most competitor wireless headsets! The warranty covers the battery too, ensuring your Leitner will last. Warranty guaranteed by Leitner Headsets. Our live US-based support is ready for any questions, inquiries or fine-tuning of your wireless work headset. UP TO 350-FOOT RANGE – UltraRange Mobility gives you 10 times the range of a basic Bluetooth headset. You can go anywhere in your house or office and stay connected. WORKS WITH MICROSOFT TEAMS & COMPATIBLE WITH TOP PHONE MODELS - The LH275 wireless headset is designed to work seamlessly with Microsoft Teams, Zoom, and other online meeting softwares, as well as all the leading phone models, including Polycom, Cisco, and Avaya. Perfect for remote work, online meetings, and your office or home office setup. BLOCK BACKGROUND NOISE – With the Leitner Ultra Noise-Canceling microphone. It blocks out background noise so your callers will hear you and only you. Check out the sound demo in the videos section of our listing!. OFFICE PHONE AND COMPUTER HEADSET – The LH275 offers Dual-Connectivity between desk phone and PC. Easily switch between the two with the press of a button. This is NOT a cell phone headset. Search Leitner LH375 for added cell phone use.