Sennheiser Communications redefines wireless freedom in office communication. The BW 900 is the tool to help you make the most out of your working day. Never miss a call, even though you are not in your office. Never suffer from poor sound quality, even though you are in a noisy environment. With the ultimate sound and perfect fit, you have ideal communication setup and can free your mind for the task at hand - a high-quality, professional phone call. The BW 900 won't let you down. It allows for unlimited talk-time - so you can just talk all day long.