GN NETCOM 935-15-503-185 Jabra Pro Telephone Accessory NOTE:Compatible with Soft Phones and Computers only  no RJ-9, mini-USB connection only 300ft Wireless Freedom - Get wireless mobility up to 100 meters/300 feet to fully control your Jabra hands-free solution with 2G4 technology 12-Hour Battery Life - A wireless audio device would not be a useful tool without an incredible battery life. Even with so much performance packed into such a small space, it still lasts up to 12 hours on a single charge HD Voice - High quality audio for crystal clear conversations Enjoy high-definition sound with HD Voice and get crystal clear, intelligible communication