This APC Back up ES 550 provides up to 48 minutes of battery backup for home computers in case of power failures. It also protects your connected equipment from damaging surges and spikes that travel over utility and phone/fax lines The included powerchute personal edition software saves your open files and shuts down your system in the event of extended power outages Together these features make the Es Series a good value for home and home office computers. 4 battery backup outlets, 4 surge protection outlets, phone/fax modem surge protection, visual indicators, audible indicators, power on button, push button circuit breaker, data port, user-replaceable battery. New. Still in box. Never used. Will come in handy.