A repeater is a transceiver installation that receives a signal and retransmits it in real time. You can place the repeater inbetween two Airios products that can not connect to eachother due to distance. The aim is to obtain a greater range and thus enable communication over greater distances. In fact you can double the range by placing the repeater in the middle. The BRDG-02M11 is a perfect example. This works ideally to extend the range and makes sure that all products have a strong connection.