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CE1Ks Pure Sine Wave 1000va 800w Single Phase High Frequency Online UPS DSP Technology Active input power factor correction (PFC) Wide range of input voltage and frequency Zero power switch delay: When the utility power fails, UPS will automatically switch from AC mode to battery mode with no delay, which will ensures stable power supply of operating system. Active Load Management Sufficient Expansion Slots The load power factor is 0.8 Model# CE1K CE1KS Comments Input voltage