If you are looking for convenience, ease of installation, and high performance, this USB modem is the answer. It's perfect whether you're traveling, at home, or at work. Just plug one end of the modem into your Windows or Macintosh computer's USB port, and connect the other end to a phone jack with the included phone cord. The USB port provides power to the modem, so you don't need a power cube! On-board digital signal processor and controller: provides the highest level of system stability and compatibility for all desktop and notebook computers with USB ports. Advanced lightning protection: provides robust protection against the leading cause of modem failure. English and Spanish documentation.