The VFI-3000AT UPS On-Line 3000VA 2700W with 4 Schuko Sockets from Powerwalker is a Tower UPS. It features 4 Schuko type sockets as well as an input and output for an ethernet cable and a telephone cable, protecting the devices connected to it, such as a router or telephone (provided their power supply is also connected to the UPS or a surge protector). Its operation is (VFI) On-Line/Double Conversion, which continuously supplies power from its battery, protecting against voltage fluctuations and power outages. Its battery can last 11 minutes with half load or 3 minutes with full load (when the connected devices draw half or the maximum current that the UPS can provide, respectively). It offers pure sine wave power, which is suitable for sensitive devices (e.g., medical equipment) and is preferred for devices with power supplies that have active PFC protection (e.g., computers).