This mini UPS is an uninterruptible power supply designed for network-critical applications. It provides protection for your personal computer, network router, modem, network attached storage (NAS), and other sensitive equipment. It also offers surge protection for your telephone/fax and coaxial cable lines. The Lithium battery packs that are used in this model have a built-in Battery Management System (BMS) to protect against overcharging, over-discharging, over-current, short circuit, and overheating. This UPS also features interactive software that allows users to monitor the UPS's operating status, including load level, battery charge level, and run time. This UPS is designed for use with 110/120/220/230/240 Vac input voltage and 24V/12V/9V/5V output voltage. It has a transfer time of 2-6 ms and a modified sine wave output. This UPS is CE, RoHS, MSDS, and UN38.3 certified.