Regulate fluctuate voltages with AVR(Automatic Voltage Regulation) ,More outlets to backup and/or protect more peripherals against counterparts ,Clear status LED indicators and audible alarms ,1050 joules surge energy rating to prevent damage from power surges or spikes ,Internet/LAN (RJ11/RJ45) surge protection ,User replaceable battery ,Cold Start to power on UPS without input power ,Free UPS management software included . 3 years warranty. | Manufacturer: Opti-UPS Part #: ES550C, SKU: ES550C, Store ID: AS551209 Condition: New, Availability: 25 In Stock Warranty: 1 Year from manufacturer 1 Review, Rating 5.0, Write a Review Tell a Friend | Submit a Question | |