Introducing the Team Orion Pro LCS Lap Counting System, including a brand new transponder. This high-quality system is perfect for RC model vehicle enthusiasts who want to keep track of their progress and improve their performance. The Team Orion Pro LCS is compatible with a range of scales, including 1:20, 1:18, 1:16, 1:15, 1:4, 1:14, 1:5, 1:6, 1:12, 1:8, and 1:10. With this lap counting system, you can easily track your progress and keep an eye on your opponents' performance. The transponder included in the system ensures accurate and reliable tracking, while the brand name Team Orion guarantees quality and durability. Whether you're a seasoned RC enthusiast or just starting out, this lap counting system is a must-have for improving your performance. 9v battery not included. uses IR to keep track of lap times with 2 transponders included.