Beskrestnov wrote on his Facebook page that the drones are using the 4.1 to 4.5 GHz video band, in particular 4.3 to 4.5 GHz.
"Most detectors don't see these frequencies, or see
them poorly. I warn you: don't let trust in a detector cost you your
life," he wrote.
He previously said Russia has mainly been using newly produced drones and missiles against Ukraine, which could indicate limited stockpiles and a direct routing of new production to the front.
In April, Capt. Vitalii Samoylenko, chief of air defense for
the Third Army Corps of the Armed Forces of Ukraine, said the Molniya unmanned
aerial vehicle — which some call "trash" — is creating major problems
on the front. He said Russian forces launch as many as 3,000 of the drones a
week against Ukrainian positions in the corps' operational area.