The Belkin Battery Backup Unit Rev B is a reliable and efficient Uninterruptible Power Supply designed to provide a steady power source in case of a power outage. With a voltage compatibility of 120V, this unit is perfect for keeping your devices running smoothly during unexpected power interruptions. The compact design makes it easy to set up and use, while its sturdy construction ensures long-lasting reliability. Although it comes without a box, the Belkin Battery Backup Unit Rev B is a dependable solution for ensuring uninterrupted work or entertainment.