SmartOnline UPS systems provide mission-critical equipment with the highest level of power protection for rackmount systems. Dual-conversion technology continually converts incoming AC power into filtered DC power, and then resynthesizes it back into AC power with a pure sine wave. Constant on-line operation completely isolates sensitive equipment from every power problem on the AC line. SmartOnline models accept the widest range of incoming voltage and frequency variations, generating the most consistently pure AC power. SmartOnline UPS systems provide reliable battery power to keep networks up safely through short blackouts and allow enough time to safely shut down during longer ones.