Tripp Lite SmartOnline 120V 1.5KVA 1350 Watts Double-Conversion UPS, 2U Rack / Tower, Extended Run, Pre-Installed WEBCARDLX Network Interface, USB, DB9 Serial (SMART1500RM2UN)

Tripp Lite SmartOnline 120V 1350 Watts Double-Conversion UPS, 2U Rack/Tower
This line-interactive UPS system protects your critical network systems from damage, downtime and data loss.
Pure Sine Wave Output When operating from battery power, a UPS system generates the waveform of its AC output. Many UPS systems generate PWM sine wave power, an approximation of the pure sine wave power you receive from your electrical utility. Although PWM sine wave power is compatible with most equipment, pure sine wave power is required by some devices -- such as computers with active PFC power supplies -- and prevents others from overheating, malfunctioning or failing prematurely. This UPS system generates pure sine wave power for superior compatibility with active PFC power supplies and other sensitive equipment.
In locations with chronic voltage problems, frequent switching to battery drains reserve power and shortens battery life. This UPS system has a feature called automatic voltage regulation (AVR) that solves the problem. The UPS detects when input voltage is out of bounds and corrects it without using the battery. All Tripp Lite UPS systems also include built-in surge protection and noise filtering to shield your equipment from destructive transient voltages and electromagnetic (EMI/RFI) line noise.