(Metal Body)The Power Guard 650VA PS Offline UPS features Automatic voltage regulation(AVR), High/ Low Voltage Protection, Overload/ Short Protection Cool. This Power Guard UPS featured an input voltage range of 145-280 VAC and a frequency of 50/60 Hz +/- 5%. It offers an output voltage of 220/230 VAC +/- 10%. It has a transfer time of 2~4 ms (Typical) and a Pure Sine Wave. This Power Guard 650VA CS UPS has an LED Indicator. The Power Guard 650VA UPS is equipped with a Lead-Acid Maintenance-Free battery. It takes a recharge time of 6 hours up to 90% capacity. It can deliver a backup time of 35-40 mins (Depending on load). The Power Guard 650VA PS Offline UPS comes with a 1-year warranty. Under the following conditions, the warranty would not be provided:• UPS burning due to thunder, abnormal overload, insect entrance and others.• If ambient temperature should not be maintained at 20 to 26 degrees Celsius with proper dehumidification. (24/7)• If the product is placed in a dusty and damp place.• In the absence of Generator connectivity Without proper battery charge, the warranty will be void.• Battery swelling and overcharging due to the wrong system voltage setting of the UPS.