The Plantronics Savi W710 wireless headset system is designed for office professionals who need seamless connectivity. Compatible with your telephone, computer and mobile phone, you can easily switch between all your devices. In addition, the Savi W710 allows you to walk and talk wire free up to 350 feet in your office and a battery rated up to 10 hours keeps the conversation going. Lastly, if you add the HL10 Lifter, you'll be able to answer/end calls up to 350 feet away from your telephone.