Once the Gardena boundary wire is laid out, the Gardena robotic mower immediately knows where to mow. The small 50-meter spool is particularly useful when new plantings are made on the lawn or parts of the garden are redesigned, requiring the cable to be repositioned in certain areas. The required length can easily be added to the existing cable. The same cable also serves as a guide wire, directing the mower back to the charging station. Please use only original Gardena connectors when connecting two pieces of boundary wire together.