This APC Back-UPS provides power and surge protection for wireless networks, computers, gaming consoles and other electronic devices in your home or business. The 2200VA tower UPS has a total of 6 outputs, 4 of which are designed for battery backup and surge protection and 2 for surge protection only. It absorbs energy up to 273 joules. It has the function of automatic voltage regulation, which corrects voltage dips and surges to the right level.