At both analog as a digital licensed walkie-talkies it is possible to repeaters (amplifiers) to use. A repeater increases the range from the point where the repeater is placed. We recommend using a maximum of one repeater for analog radios. With digital radios from Motorola or Kenwood it is possible to use multiple repeaters. You can connect different repeaters based on IP. This is also possible at a great distance, so that different branches can be connected to each other. Motorola MotoTRBO articles and Kenwood Nextedge articles support digital walkie-talkies.