The Tunguska-M1 self-propelled anti-aircraft missile and gun system have been shielding the Russian military since the outset of the special military operation in Ukraine. How does the Tunguska work?

The Tunguska-M1 self-propelled anti-aircraft missile and gun system have been shielding the Russian military since the outset of the special military operation in Ukraine. How does the Tunguska work?