Automatic Voltage Regulation keeps output voltage within acceptable user selectable levels Graceful shutdown using serial or USB cables via PowerChute Serial Shutdown User-selectable high voltage setting of 200V-240V Add up to 10 external battery packs (SMX120BP) Short depth UPS provides extra space for cable management Ideal for servers, storage, networking & commercial applications 2200VA/1980W line interactive pure sine wave 4U rack/tower UPS (rail kit AP9625 sold separately) This product is heavy and/or oversized and may need more than one person to handle. Helps save energy - designed to limit the energy used by other products, potentially helping you reduce your carbon footprint and save money.