The CyberPower CST135ALU 1350VA/810W UPS is a reliable battery backup and surge protector designed to provide uninterrupted power for your computer, networking equipment, and other electronic devices. With a maximum wattage of 810W, this CyberPower product is suitable for small offices or home use to ensure continuous operation during power outages or surges. The compact design and battery backup feature make it a convenient and essential tool for maintaining connectivity and protecting your devices from unexpected power disruptions. The batteries have been removed this unit you will have to buy your own batteries..very easy to install.