He means about the turbo timer.
I've got one and been really surprised! I didn't want to consider one and was set on a pd130. Bought our 110 ASV and been really impressed, goes like stink as standard and achieves between 42 - 50mpg at all times. On a run to Bristol it ticked over 53mpg. I've gone from filling up every 4 days to near on 2 weeks.