I mentioned that on Twitter. It turns out that those are the limits according to the laws in US (20 mph) and EU (25 km/h), so it's top speed is limited accordingly depending on the country it's in. It's also an amazingly confusing way of putting it.

Uh...yeah...20mph isn't 25km/h even if you are in the EU. They could use an additional sentence there.

And worse...where does that leave Canada? Or any other of the 98.5% of countries that use the metric system?