Panamax MB850 Battery Backup 5 Battery Powered and Surge Protected Outlets 4 Fulltime Surge Protected Outlets USB/Serial Port To PC 1 Pair, In/Out Coax / Cable Sat Surge Protection Resettable Circuit Breaker The MB850 provides automatic voltage regulation for inconsistent utility power. The MB850 features 890 Joules of surge protection, and provides battery backup during power outages. The MB850 ensures consistent power to your computer system and its included software will automatically save your open files and shutdown your computer system during a utility power loss.