Hello,
I'm talking about the use in the game.
According to the user manual, chapter 2-5
"The Ka-50 radio communications suite includes two R-800L1 and one R-868 VHF transceivers; an automatic data transmission system that updates ground controllers of the helicopter’s position and performance; the SPU-9 intercom system; the P-503B device that records any signals coming through the pilot's headphones; and the Almaz-UP-48 voice message unit (VMU) system that is capable of providing voice warning reports to the pilot of eleven types of flight emergency situations.
The Ka-50 is also equipped with an IFF transponder, the ARK-22 radio compass, and the A-036A radio altimeter."