700VA / 420W battery backup uninterruptible power supply 6 total outlets; 3 outlets provide ups power backup and surge protection; 3 outlets offer surge protection only Automatic voltage regulation (AVR) maintains safe voltage conditions without using backup battery power When the power goes out, an APC battery backup with surge protection provides power for computers, external hard drives and other electronics, including your wireless router so you can maintain a network connection for IoT devices when you need it most Replaceable Battery and Energy-Star Certified; The battery can be replaced with APC replacement battery model RBC17 (sold separately)