Emerson PowerSure PSA 500VA. Output power capacity (VA): 500 VA, Output power: 300 W, Power supply input frequency: 46.5 - 63.5 ±0.1 Hz. Cable length: 2 m. Battery technology: Sealed Lead Acid (VRLA), Typical backup time at half load: 21 min, Typical backup time at full load: 7 min. Weight: 7400 g. Bundled software: MS Windows NT/2000/XP/95/98/ME, AIX, Linux, Sun Solaris, HP-UX, Novell Netware