Purely sinusoidal output voltage The guidance based on the digital microprocessor AVR – arrangement of the automatic regulating of the mains voltage He is accommodating himself to the frequency Gentle sound of the alarm Automatic diagnostics at the start “Cold start” – starting the network atonic Automatic restart in the course of the return of the tension Intelligent managing the battery Security przeciwzwarciowe and against deep relieving Autoload of the battery in the network mode Optional RS232 ports / USB and the telecommunications filter and LAN