Made in Germany by RC Carbon Cavalieri
The functions are:
1: Move the rear wing 5mm backwards to improve the downforce
2: Move the position of the rear shock to improve the buffer
3: Move the position of rear suspension arm to improve rear axle geomettry
All these together improves the stability of the rear end on rough surfaces, on accelerating and on jumps.
for assembly it is necessary to eliminate and part of the diff casse, look at the photos.