Energy-saving Back-UPS Pro 900, 230 VAutomatically increases low voltage gradually and reduces high voltage to levels suitable for your equipment.Protects connected devices from overvoltages on data lines.The alphanumeric display shows system parameters as well as warnings.Allows management of the UPS via the USB port.Key UPS status parameters at a glance: Multiple status indicators with bar graphs showing load and battery status.Patent-pending operating mode in which unused electrical components are switched off when power supply conditions are good, so that very high operating efficiency can be achieved without compromising safety.Energy-saving functions automatically switch off peripheral devices when the master system, usually a PC, goes into standby mode or is shut down. The power supply to the peripheral devices is immediately restored as soon as the master system is reactivated or switched on.Reserves capacity and backup time for connected devices that must be switched to UPS battery operation in an emergency; less important devices are only protected against overvoltagesExtends the service life and backup time of batteries by correcting undervoltages without discharging the battery.