The transmitter is an optional device that is placed in the battery cover and after embedded in resin. It makes it possible to detect miners in the underground even through rocks or coals of 25m thick. It is very useful in case of accidents because rescue teams can determine the position of the miners.
Autonomy: min 168 hours of operation
Emission frequency / number of channels: 4100 - 5850 Hz / 8 channels
Range of action / location distance: up to 50m / 25m