I was playing about with pp2000 the other day, activated the overspeed warning just to give it another go it never worked in the past, forgot i turned it on and today on the motorway i got this:
If the car passes 70 mph the screen flashes up this message and the bleeper sounds repetitively, i don't know how it can be adjusted to a different speed, its good to know it works.
I activated mine too, just to see what would happen - I soon turned it off again...
2003 2.2hdi estate - mine 1998 Volvo 940 auto estate - also mine 2019 Citroen C3 something - the wife's PP2000 user, can help with faults / diagnostics in the Bournemouth area.