After laying the GARDENA Boundary Wire, the GARDENA Robotic Lawnmower knows immediately in which area mowing should take place. The small 50-metre cassette is particularly practical if there are newly planted areas on the lawn or parts of the garden will be newly landscaped, making it necessary for the wire to be laid again. The required length can simply be added to the existing wire. The same wire also serves as a guide wire, showing the Robotic Lawnmower the way back to the charging station. Please only use original GARDENA Connectors if it is necessary to join two pieces of boundary wire.