The Line-R is a microprocessor controlled tap changing power conditioner, which automatically corrects brownouts and overvoltages, and stabilizes chronic line voltage variation. Line-R also provides multi-stage surge suppression and full-time EMI/RFI filters to handle all the problems your equipment is likely to face. A voltage meter on the Line-R's front panel displays the relative input voltage level and alerts you to low or high voltage conditions. A front panel surge protection integrity light indicates the health of the circuitry. In addition, an audible alarm alerts you to extreme input voltages that cannot be corrected to within the normal output voltage regulation band. Line-R automatically performs self-tests, and its "adaptive mode" also senses and corrects frequent tap changing, thereby reducing wear on the relays for a longer life span and quiet operation. LE-600: 600VA/600 Watts - Great for POS systems, Small phone systems, fax machines, etc. LE-1200: 1200VA/1200 Watts - Great for Computers, Phone systems, Laser Printers, Industrial Control Equipment