The APC SCL500RMI1UNC Smart-UPS C Lithium-Ion provides temporary battery power when the utility power is out. It also provides for remote management and control of the UPS over a network out of the box. Intelligent and efficient network power protection from entry level to scalable runtime. Ideal UPS for servers, point-of-sale, routers, switches, hubs and other network devices. Features - USB connectivity - Serial connectivity - Network manageable - Audible alarms: Actively let you know if the unit is on battery, if the battery is low or if there is an overload condition. - Disconnected battery notification: Warns when a battery is not available to provide backup power. - Automatic self-test: Periodic battery self-test ensures early detection for battery replacement - Battery failure notification: Provides early-warning fault analysis on batteries - Adjustable voltage sensitivity - User-replaceable batteries