This 120V line-interactive AVR UPS system provides reliable battery backup and AC power protection against blackouts, brownouts, surges and line noise that can damage valuable electronics or destroy data. The 10-outlet UPS is ideal protection for your home office or media center components, including computers, routers, printers, NAS drives, HDTVs, Blu-ray players, game consoles, media players, DVRs and audio receivers. Backup support allows you to work through short power failures, and gives you enough time to safely save files and shut down your system in case of a prolonged blackout. Backup time varies according to load, but the line-interactive UPS system should keep an energy-efficient desktop computer with LCD monitor powered as long as 75 minutes. During normal operation, incoming utility power keeps the UPS battery fully charged, so backup power will always be available. The hot-swappable internal batteries can be replaced by the user. Five 5-15R outlets provide both battery backup and surge protection for your computer, monitor and other crucial components. The other five 5-15R outlets are surge-protected only for printers, scanners and other non-essential equipment. Two outlets - one battery/surge and one surge-only - are spaced apart from the others to accommodate bulky transformers. Four are ECO outlets designed to save you money and protect the environment (see below). By meeting strict EPA efficiency guidelines, this ENERGY STAR-certified UPS system helps you save money and energy. An ECO power-saving option features four ECO outlets - three surge-only, one surge- and battery-protected - that turn off automatically when the device connected to the Battery Backup Master Outlet is powered down or in sleep mode. These outlets are recommended for printers, desk lamps and other non-essential peripherals that don't need to be operational all the time.Use the included USB cable to connect the USB-B port to your computer. Working with Tripp Lite's free downloadable PowerAlert software, this optional feature can enable safe unattended system shutdown and file saves in the event of a prolonged power failure when you aren't around.AVR protects your equipment from incremental hardware damage, data loss and performance problems caused by brownouts. The ECO1300LCD can correct brownouts as low as 86V back to nominal 120V power without drawing on the battery backup needed to support your equipment during a blackout.A 316-joule surge suppression rating protects connected components from the harmful effects of power surges. Dual network data line surge suppression jacks protect a wired peripheral from dangerous surges on a single 10/100Base-T or dial-up network connection.Two 5V USB ports share 2.1 amps of maximum charge current for charging smartphones, tablets, MP3 players and other essential mobile devices compatible with USB chargers. These ports are intended only for USB charging, which is available when the UPS system is turned on and receiving utility power.Various electromagnetic and radio sources found in virtually every home and business can cause disruptive interference on the AC line. Known as EMI (electromagnetic interference) and RFI (radio frequency interference), this line noise is a common cause of performance problems and can lead to incremental hardware damage, data corruption and audio/video transmission problems.