OPTI-UPS ES550C UPS represent an advanced and mighty power supply system for home and office users with the strongest level of power protection. With high UPS capacity, strong AVR and robust battery ES550C allows you to keep your systems working stable even in worst power supply conditions. No longer an old fridge, aircon or washing machine have any influence on your work, careless neighbors do not disturb you with their voracious electro appliances, your can use your PC calm and sound even during most severe lightning storms. A flexible software package free bundled with UPS will make sure your files are saved and OS closed correctly in case of long blackouts during your absence. Forgot to turn off your systems No need to return home, do it remotely through internet.