Jabra PRO 9470 Mono Flex Replacement Headset only for use with PRO 9400 Series Base (Base Not Included) Noise Blackout - Jabra Noise Blackout technology eliminates disturbing background noise such as wind, surrounding conversations or traffic to enhance your voice. 150m Wireless Freedom - Get wireless mobility up to 150 meters to fully control your Jabra hands-free solution with DECT technology. Answer calls, multitask and move freely around on your terms. HD Voice - High quality audio for crystal clear conversations Enjoy high-definition sound with HD Voice and get crystal clear, intelligible communication Remote Asset Management - Configure and implement the company's audio devices 100% remotely from one central point. You get the latest features and functionalities on one go with Jabra Xpress, a web-based solution.