Improve or establish radio coverage in garages, shelters, etc with an indoor repeater.
With an indoor repeater solution you obtain satisfactory reception even in locations usually outside the coverage area. Depending on the space the repeater needs to be supplemented with a specific antenna system for optimum performance.
For “normal” rooms and ordinary antenna can be sufficient but, for larger spaces like tunnels and mines might demand a series of antennas or a leaky cable. It all depends on your specific needs.