This is a Carrera Digital 124/Digital 132 Pit Lane. It can only be used in combination with Control Unit 30352. It allows you to "refuel" the cars. You will need Driver Display 30353 to display tank fuel capacity. This newer pit lane has a sensor in it that counts laps, so it should be added at the start/finish line track so double counting laps doesn"t occur. The only difference between the new pit lane and the older pit lane 30346 is the adapter track that has this sensor. Other than that they are absolutely identical.