We are new to this and need a transponder. There are a few options online and a significant price difference.
I think the most popular one is the AMB Tranx 160 but my laps also do one for jut over £100.
Hi Adam both work well. I have the my laps one which is great and I definitely recommend. The main reason for the tran x 160 one being so popular is because it has been around a very long time now.