Avoid lost calls or missed messages during a power failure! Plug your cordless phone or answering machine into CyberPower's battery back-up unit and receive more than 4 hours of emergency back-up power. It has built in surge protection to prolong the life of your connected electronics, and included adapters allow the unit to work with any 6V, 7.5V, 9V or 12V cordless phone. The built-in transformer plug replaces your phone's standard, bulky wall adapter. When a power failure occurs, the emergency utility light activates making sure you're not left in the dark. There's also a lifetime warranty with a $10,000 Connected Equipment Guarantee. The PhoneSaver provides safety, convenience and peace of mind at a time you need it most.