 A teletank is controlled by radio from a control tank at a distance of 500–1,500 metres, the two constituting a "telemechanical group".Teletanks were used by the Soviet Red Army in the Winter War, fielding at least two teletank battalions at the beginning of the World War II on Eastern Front.Teletanks were equipped with DT machine guns, flamethrowers, smoke canisters, and sometimes a special 200–700 kg time bomb in an armoured box, dropped by the tank near the enemy's fortifications and used to destroy bunkers up to four levels below ground.