The VI 650 SH Schuko UPS Line-Interactive 650VA 360W with 2 Schuko Sockets from Powerwalker is a Tower UPS. It features 2 Schuko type sockets as well as an input and output for the telephone line, protecting the devices connected to it, e.g., telephone (provided that their power supply is also connected to the UPS or a surge protector). Its operation is (VI) Line-Interactive, which continuously adjusts the output voltage through an automatic voltage regulator, protecting against voltage fluctuations and power outages. Its battery can last 6 minutes at half load or 0 minutes at full load (when the devices connected draw half or the maximum current the UPS can provide, respectively).