Tripp lites omni900lcd line-interactive digital ups system offers voltage regulation, surge suppression and long lasting battery support for personal computers, home entertainment systems and media centers. Internal ups circuits support entry level pcs for up to 50 minutes or individual vcr/dvr components for as long as 2.5 Hours during power failures. Prevents data loss, viewing interruptions, lost recordings and loss of component programming. Automatic voltage regulation (avr) circuits regulate brownouts as low as 89 volts back to usable levels without using battery power. Offers complete power protection in an attractive black tower configuration. Includes 4 battery-supported and surge-protected outlets, plus 4 additional surge suppression-only outlets for items not requiring battery support. Usb port enables optional unattended system shutdown without data loss in the case of extended power failure, usb cable included. Poweralert software available via free download from www.Tripplite.Com. Hid compliant usb interface enables full integration with built-in power management and auto shutdown features of windows, mac os x and linux. Built-in audible alarm and large lcd front panel voltage display indicates line power status, battery power status, battery low/replace status and voltage boost operation. 900Va / 475 watt power handling ability supports entry-level pcs, home entertainment systems, network workstations, audio/video components. Offers 4 minutes battery runtime with a full load of 900va/475 watts and 15 minutes with a half load of 450va/237 watts. 2 Year warranty. $200,000 connected equipment insurance (usa and canada only). Features: lcd display indicates input voltage, battery capacity and a variety of operating conditions. 900Va line-interactive rackmount shelf / tower ups system. 8 Outlets (4 ups / 4 surge-only). Usb port with hid protocol support, cabling and poweralert monitoring software (web download). Corrects brownouts as low as 89v. $200,000 ultimate lifetime insurance (usa, puerto rico and canada only). Specifications: output: output volt amp capacity (va): 900. Output watt capacity (watts): 475. Output nominal voltage: 120vac. Output voltage regulation: battery mode: pwm sine wave 115v +/-5%. Output frequency regulation: line mode: passes line frequency of 60hz +/-10% battery mode: inverter output regulated to 60hz +/-0.5Hz. Outlet quantity / type: 8 nema 5-15r output receptacles (4 with ups and surge suppression / 4 with surge suppression only). Input: maximum input amps: 12a. Input connection type: nema 5-15p. Input cord length: 6 ft. / 1.8 M. recommended electrical service: 120v 15a. Battery: full load runtime: 4 minutes (900va / 475 watts). Half load runtime: 15 minutes (450va / 237 watts). Dc system voltage: 12vdc. Typical battery lifespan: 4-6 years (depending on usage). Battery recharge rate: 2-8 hours to 90%. Physical: unit dimensions (hwd/in): tower format: 12 x 3.5 X 6.5 / Rackmount shelf format: 3.5 X 12 x 6.5. Certifications: ul1778 (tuv), cul (tuv), nom, fcc class b. Warranty: product warranty: 2 year product warranty. Connected equipment insurance (usa and canada only): $200,000 connected equipment insurance (usa and canada only).