Protect home & office computer systems & electronics with this Line-Interactive UPS System. Some outlets have both battery backup & surge / noise protection, & some have surge / noise protection without battery backup. The "surge-only" outlets allow you to connect additional equipment without overloading the UPS or reducing the backup runtime available during an outage. Select outlets have extra-wide spacing to accommodate bulky AC adapters without blocking adjacent outlets. All Tripp Lite UPS systems also include built-in surge protection & noise filtering to shield your equipment from destructive transient voltages & electromagnetic (EMI / RFI) line noise. Use the HID-compliant USB port & your computer's built-in power management features or the USB port with Tripp Lite's free PowerAlert software to manage this UPS. Protection Type: DSL; Fax; Modem; Phone; Power; System VA: 900 VA; Backup Time at Half Load: 10 min @ 240 W; Lines: 1.