Mylaps X2 Pro Transponder

The X2 Pro Transponder is the most accurate and reliable
transponder on the market, and operates via 2-way
communication, sending and receiving data when it passes the
loop. The transponder has an internal clock, internal memory
and can be connected to the CAN bus data protocol of the racing
vehicle.
This means you can retrieve the data in your data logger software,
use it for the ECU mapping of the car, depending on the sectors,
and show lap times on the display of the car. The accuracy and
reliability of the X2 Pro Transponder is better than any type of
beacon or GPS system.