The Back-UPS provides professional-grade power protection for office and home office systems. Battery powered & surge protected power outlets, built-in phone/fax/modem line (DSL compatible) protection, safe system shutdown software with sophisticated power management features and pro-active audio-visual status indicators ensure office systems and their valuable data are protected from dangerous power surges, spikes and blackouts. Serial or USB connectivity gives users more flexibility making installation quicker and easier.Lightning and Surge ProtectionProtection from surges, spikes and even lightning is guaranteed!Resettable circuit breakerInstead of a hard to find fuse, there is a push-button circuit breaker for easy recovery from an overload or short circuit.Audible alarmsProactively notifies you of changing UPS and utility power conditions.Automatic self-testPeriodic battery self-test ensures early detection of a battery that needs to be replaced.Transformer Block SpacingDesigned to allow the use of up to two transformer block plugs without blocking access to other receptacles.APC Back-UPS, 400 Watts / 650 VA, Input 230V / Output 230V , Interface Port DB-9 RS-232, USBIncludes: CD with software, Documentation CD, Qty 2 - Detachable IEC C13 to IEC C14 power cords, USB cable