The EATON 9E uninterruptible power systems (UPS) protects your sensitive electronic equipment from the most common power problems, including power failures, power sags, power surges, brownouts, line noise, high voltage spikes, frequency variations, switching transients, and harmonic distortion. Power outages can occur when you least expect it and power quality can be erratic. These power problems have the potential to corrupt critical data, destroy unsaved work sessions, and damage hardware - causing hours of lost productivity and expensive repairs. With the EATON 9E, you can safely eliminate the effects of power disturbances and guard the integrity of your equipment. Providing outstanding performance and reliability, the EATON 9E's unique benefits include: • True online double-conversion technology with high power density, utility frequency independence, and generator compatibility. • Standard communication options: one RS-232 communication port, one USB communication port • Optional connectivity cards with enhanced communication capabilities. • Extended runtime with up to four Extended Battery Modules (EBMs) per UPS. • Backed by worldwide agency approvals.